R50A Ultra Mobile PC User Manual
E3850 First Edition August 2008 Copyright © 2008 ASUSTeK Computer, Inc. All Rights Reserved. No part of this manual, including the products and software described in it, may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any means, except documentation kept by the purchaser for backup purposes, without the express written permission of ASUSTeK Computer Inc. (“ASUS”).
Table of Contents About this guide.................................................................6 How this guide is organized.....................................................6 Conventions used in this guide................................................7 Safety information..............................................................8 Transportation Precautions . ..................................................9 Package contents.............................................................
Starting up.........................................................................34 Powering on your UMPC.......................................................34 Managing power settings.......................................................35 Chapter 2: Using your UMPC Navigating your UMPC.....................................................38 Using the navigation buttons.................................................38 Using the stylus..............................................................
Using GPS.........................................................................62 Connecting to a wireless network..................................63 Troubleshooting Troubleshooting...............................................................66 Appendices Notices..............................................................................70 ASUS Contact information..............................................
About this guide This user guide provides information on the various components of the Ultra Mobile PC (UMPC) and how to use them. How this guide is organized • Chapter 1: Getting started This chapter describes the features of your UMPC. • Chapter 2: Using your UMPC This chapter provides you the steps in using your UMPC. • Chapter 3: Multimedia features This chapter provides you with information on the multimedia features of your UMPC.
Conventions used in this guide To ensure that you perform certain tasks properly, take note of the following symbols used throughout this manual. DANGER/WARNING: Information to prevent injury to yourself when trying to complete a task. CAUTION: Information to prevent damage to the components when trying to complete a task. IMPORTANT: Instructions that you MUST follow to complete a task. NOTE: Tips and additional information to help you complete a task.
Safety information IMPORTANT! Disconnect the AC power and remove the battery pack before cleaning. Wipe the UMPC using a clean cellulose sponge or chamois cloth dampened with a solution of nonabrasive detergent and a few drops of warm water then remove any extra moisture with a dry cloth. DO NOT place on uneven or unstable work surfaces. Seek servicing if the casing has been damaged. DO NOT place or drop objects on top and do not shove any foreign objects into the UMPC. DO NOT scratch the display panel.
Transportation Precautions To prepare the UMPC for transport, turn it OFF and disconnect all external peripherals to prevent damage to the connectors. The hard disk drive’s head retracts when the power is turned OFF to prevent scratching of the hard disk surface during transport. Hence, do not transport the UMPC while it is still turned ON. Cover Your UMPC Cover your UMPC with the bundled protection bag to protect it from dirt, water, shock, and scratches.
Package contents Standard items Check your UMPC package for the following items: Standard Items R50A UMPC • Protection bag • Mini-USB audio cable • DigiPen stylus • 10-pin VGA out cable • User Guide • Screen protector • Quick Start Guide • Adapter • Driver CD • Adapter plug • Recovery DVD • Wrist strap • Earphone • USB keyboard • Earphone plug • NOTE: If any of the above items is damaged or missing, contact your retailer.
Special features Product highlights Power and Mobility ASUS R50A provides you with a secure and convenient computing experience. It offers a smart balance between mobility and performance with comprehensive security features that protect both software and hardware solutions. Portable and lightweight design ASUS R50A’s portable and lightweight design is packed with computing, multimedia, and connectivity features.
The exclusive ASUS Security Protect Management (ASPM) guards access to the device and network. Users can choose to setup multi-factor authentication requirements for different security levels while enjoying the Single Sign On (SSO) onetime login convenience without compromising security integrity. Intuitive Usage Experience ASUS R50A includes the Windows® Vista Tablet PC Edition with Touch Pack software and ergonomic hardware interface designs.
1 Getting started In this chapter • Proper posture when using your UMPC • Getting to know your UMPC • Getting your UMPC ready • Starting up
Proper posture when using your UMPC When using your UMPC, maintaining the proper posture is necessary to prevent strain to your wrists, hands, and other joints or muscles. This section provides you with tips on avoiding physical discomfort and possible injury while using and fully enjoying your UMPC. Maintaining the proper posture • • • • • , Do not place your UMPC on your lap or close to your skin for a long time. Use your UMPC in a comfortably-lit and well-ventilated area.
Getting to know your UMPC Front features 1 2 14 3 13 12 4 11 10 5 9 6 8 7 Features 1 Display Panel The 5.6-inch active matrix, 1024 x 600 resolution TFT LCD screen provides you with excellent viewing similar to that of desktop monitors. 2 Front camera lens This 0.3 megapixel built-in camera is used for video conferencing and other interactive applications. 3 Joystick This a pointing device that mimics the functions of a desktop mouse.
Features 4 Status indicators Allows you to check the status of your battery, drive activity, WLAN, and Bluetooth. The LED notifies the following: Power • White: The UMPC is turned on. • Blinking white: The UMPC is in the Sleep/Standby mode. • Off: The UMPC is turned off or in Hibernation mode. Battery • Red: The battery is charging. • Blinking red: The battery capacity is less than 10%. • Off: The battery is fully-charged. HDD • White: The UMPC is accessing the hard disk drive.
Features 8 Sleep Mode button Press this button to put your UMPC into Sleep mode. Slide down the power switch to awaken your UMPC from Sleep mode. 9 LOGIN button The LOGIN button sends a [Ctrl + Alt +Del] keyboard combination to the operating system to show Windows Security for logging in/off, locking, shutting down, launching the task manager, or changing passwords. This special login feature is also known as Secure Attention Sequence (SAS).
Right features 1 2 3 4 Features 1818 1 Wrist strap hole Attach the supplied wrist strap into this hole to prevent accidentally dropping the UMPC when holding it in your hands. 2 VGA port Use this port with the bundled VGA out cable to connect your UMPC to a monitor. 3 Battery Lock Keeps the battery secure. Press up then slide the back cover downward to detach the battery. 4 USB Port (2.0) Insert USB2.
Left features 1 3 2 4 Features 1 Power switch Turns on/off the UMPC and puts it on Sleep/Standby or Hibernation mode. 2 Mini-USB port Insert external USB devices into this port. 3 TV tuner port Connect a TV antenna into this port. NOTE: The TV antenna is purchased separately and is not included in your UMPC package. 4 MicroSD slot Insert a microSD card into this slot.
Top features 7 1 2 3 4 5 2 6 Features 1 Camera button Press to launch the camera application and take photos or video clips. 2 Speaker system The built-in speaker system allows you to listen to rich and vibrant high-quality stereo sound. 3 Power (DC) port Insert the AC adapter into this port to connect your UMPC to an external power source. 4 Headphone jack Insert R50A headphone into this port. 5 Hold key Move this key to the left to disable the buttons and LCD of th UMPC.
Bottom features 1 2 3 Features 1 Wrist strap hole Attach the supplied wrist strap into this hole to prevent accidentally dropping the UMPC when holding it in your hands. 2 Reset button Insert a sharp-pointed object such as a clip or a ballpen into this hole to reset your UMPC. 3 Air vent The air vent allows cool air to enter and warm air to exit the system.
Back features 1 2 Features 2222 1 Battery Pack The battery pack provides power to the UMPC. To charge the battery, connect the UMPC to an external power source using the AC adapter. 2 Back camera lens The 2.0 megapixel auto-focus built-in camera allows you to take photos or videos.
Getting your UMPC ready Before using the UMPC for the first time, ensure that the battery pack is fully charged. Charging the battery pack Your UMPC package comes with a universal AC-DC adapter which charges the battery pack, and in turn supplies power to your UMPC. You may connect the adapter to a 100120V or 220V-240V outlet without setting switches or using power converters. To charge the battery pack: 1. Connect the adapter plug to the AC adapter. 2.
AC Adapters The following is the list of AC adapters that are compatible with various power plugs or sockets used in specific countries. A Area Country/District Voltage Cycle Socket Asia Korea 100.
Installing/removing a microSD card Your UMPC is equipped with a microSD card slot. A microSD card provides you with additional storage space for your files. To install the microSD card: 1. Locate the microSD card slot at the left side of the UMPC. 2. Lift to open the slot cover. 3. With the golden fingers facing down, insert the microSD into the slot until it fits in place. 4. Replace the slot cover. To remove the microSD card: 1. Lift to open the slot cover. 2.
Installing an external foldable USB keyboard To install an external foldable USB keyboard: 1. Slide the latch downward to unlock the USB keyboard. 2. Gently pull up to open the keyboard. 3. Locate the Lock/Unlock latch and slide the latch leftward to lock the keyboard in its open position.
4. Gently pull both ends of the mini-USB cable to extend it. 5. Connect the mini-USB cable to the mini-USB port on the USB keyboard, and connect the other end of the cable to the mini-USB port on the UMPC.
Connecting an external monitor You can connect your UMPC to an external monitor. The screen display on the external monitor is synchronized with that on the LCD monitor of your UMPC. In this way, the lifespan of the LCD monitor is extended. To connect your UMPC to an external monitor: 1. Turn off your UMPC. 2. Plug one end of the external monitor cable to a port on your UMPC and the other end to the 15-pin D connector of the external monitor.
To switch screen display after powering on your UMPC: 1. Turn on your UMPC. 2. Select from any of these display modes: a. Display on your UMPC and the external monitor (default). b. Different display on your UMPC and the external monitor. c. Display only on the external monitor. 3. Click OK. To switch screen display manually: 1. Click > Windows Media Center. 2. Select Connect to monitor. 3. Select from the three modes. 4. Click OK. To adjust the display resolution: 1.
Connecting an external mouse (optional) This UMPC comes with a few USB ports for connecting devices such as a USB keyboard / mouse. To connect an external mouse: • Connect the USB plug of your USB mouse to a USB port on your UMPC. CAUTION: Do not apply too much force when connecting a USB keyboard / mouse to a USB port on your UMPC. The USB plug fits in only one correct orientation. Connecting an external headphone This UMPC comes with a Line Out port for connecting an external headphone or speaker.
Connecting to a port bar (optional) This optional external PortBar comes with a D-Sub port, S/PDIF Out port, LAN (RJ-45) port and USB 2.0/1.1 ports. Use this external PortBar to quickly connect peripherals, such as keyboard, mouse, or CRT monitor, to your UMPC. NOTE: The port bar is purchased separately and is not included in your UMPC package. UP DC 5V IMPORTANT: • Use an AC power adapter when using the port bar. The port bar cannot be used when the UMPC is in battery mode.
Connecting an external ODD (optional) To connect an external ODD: 1 Connect one end of the ODD USB cable to the mini-USB port at the back of the ODD and the other end to a USB port on your UMPC. 2. Connect the adapter plug to the ODD AC adapter. 3. Connect the adapter to the ODD’s DC port. 4. Plug the ODD adapter to a power outlet.
Connecting an external TV antenna (optional) Connect your UMPC to a TV antenna for home or car use. To connect an external TV antenna: 1. Connect the TV antenna cable to the antenna port on the left side of your UMPC. 2. Relocate or reorientate the antenna to get the best signal reception. 3. Click > Programs > TVB-T Mobility > TVB-T Mobility to launch the TV antenna application. 4. Select channels, adjust volumes, or record videos.
Starting up Powering on your UMPC Like a regular desktop PC, your UMPC automatically runs a series of diagnostic tests called Power-On Self Test (POST) upon turning it on. After POST is completed, your UMPC boots up, then its Windows® operating system starts automatically. To power on your UMPC: 1. Locate the power switch at the left side of your UMPC. 2. Press the switch down to turn on the UMPC. The UMPC boots up, then the operating system starts automatically. 3.
Managing power settings Your UMPC allows you to control and manage the power settings to save battery power, maximize system performance, or to achieve both. Selecting a power plan Your UMPC provides you with power plans, which are collections of power management settings. These power plans make use of the ASUS Power4 Gear eXtreme, an ASUS utility that allows you to adjust system settings such as display brightness and CPU frequency to maximize performance as well as to extend battery life.
Creating a power plan To create a power plan: 1. From your UMPC screen, go to > Control Panel > Classic View > Power Options. 2. Click Create a power plan. 3. Select from these power plan options: Power Plan Description Balanced Balances your UMPC’s performance with its energy usage. Power saver Provides you with the longest battery life and reduces your UMPC’s performance where possible. High performance Maximizes your UMPC’s performance, but uses more battery power. 4.
2 Using your UMPC In this chapter • Navigating your UMPC • Entering data • Securing your UMPC • Getting Windows® Help and Support
Navigating your UMPC Use the buttons (arrow/enter buttons, joystick, left/right keys), the stylus, or gestures to select items or navigate through programs on your UMPC. Using the navigation buttons Left/right buttons The left/right buttons perform the left-click and right-click functions of a conventional mouse. Joystick The joystick enables you to move the cursor around the screen.
5-way Navigation buttons Button FUNCTION Left arrow Press to scroll to the left of a page. On a menu list, press to launch the next menu to the left, or to close a submenu. Right arrow Press to scroll to the right of a page. On a menu list, press to launch the next menu to the right, or to launch a submenu. Up arrow Press to scroll up a page. On a selection option, press to move up the selection list. Down arrow Press to scroll down a page.
Entering data You may use a bi-fold keyboard or the Tablet PC Input Panel to write text, characters, or symbols on your UMPC. NOTE: The bi-fold keyboard is an optional accessory and is not included in your UMPC package. Using the Tablet PC Input Panel The Microsoft® Vista Tablet PC Input Panel enables you to enter text on your UMPC without using a standard keyboard. The Tablet PC Input Panel provides you with these three input methods: Writing Pad, Character Pad, and On-screen Keyboard.
Using the Writing Pad The Writing Pad allows you to write continuously, and converts your handwriting to typed text. To use the Writing Pad: 1. Launch a word processor such as WordPad. To do this, go to > All Programs > Accessories > WordPad. 2. Tap to launch the Tablet PC Input Panel. 3. On the input panel, tap to launch the Writing Pad. 4. Using your DigiPen stylus, write on the screen as you would write on a piece of paper. 5. When done, tap Insert to enter the text on the WordPad.
Using the Character Pad The Character Pad converts each of your handwritten text, symbol, or character into typed text one at a time. To use the Character Pad: 1. Launch a word processor such as WordPad. To do this, go to > All Programs > Accessories > WordPad. 2. Tap to launch the Tablet PC Input Panel. 3. On the input panel, tap to launch the Character Pad. 4. Using your DigiPen stylus, write on the screen as you would write on a piece of paper.
Using the On-screen Keyboard The on-screen keyboard is a virtual keyboard that allows you to enter data using the stylus, mouse, or joystick. To use the On-screen Keyboard: 1. Launch a word processor such as WordPad. To do this, go to > All Programs > Accessories > WordPad. 2. Tap to launch the Tablet PC Input Panel. 4. On the input panel, tap to launch the On-screen Keyboard. 5. Tap the keys that you want to enter.
• Z-shaped scratch-out • Circular scratch-out • Vertical scratch-out Using editing gestures Use editing gestures in the writing pad or in the character pad. There are two sets of editing gestures that you can use: • Common editing gestures used on handheld computers or PDA devices. • Editing gestures from the Simplified Chinese (PRC) standard, GB/T 18790-2002, adopted by the Chinese government.
Selecting editing gestures To select the editing gesture: 1. Launch the Tablet PC Input Panel. 2. Tab Tools > Options > Gestures tab. 3. From the Gestures tab, select Use gestures commonly used on handheld computers or Use gestures from the Simplified Chinese (PRC) standard, GB/T 18790-2002. NOTE: For more details on gestures and other features of the Tablet PC Input Panel, refer to the Help menu of the Tablet PC Input Panel or to Microsoft® Windows Help and Support.
Calibrating the screen Calibrating the screen ensures that the touchscreen feature of the UMPC works properly when tapped with the DigiPen stylus or with your finger. To calibrate the screen: Click > Control Panel. From the Classic View, tap Tablet PC Settings. From the General tab, click Calibrate. Tap the center of each crosshair that appears near each corner to complete the calibration process. 5. When done, tap OK to save the calibration data. 1. 2. 3. 4.
Setting up your password To set up your password: Click > Control Panel > ASUS Security Protect Manager. From the Settings and Options list, then Multifactor Authentication. Select the Credentials tab, then Password Authentication. Tap Register to launch the ASUS Security Protect Manager Registration Wizard appears. 5. Follow the onscreen instructions to set up your password. 1. 2. 3. 4.
Getting Windows® Help and Support Windows® Help and Support provides you with guides and answers in using the applications in Windows® Vista platform. To launch Windows® Help and Support, go to 4848 > Help and Support.
3 Multimedia features In this chapter • Using the Windows® Media Center • Using the camera
Using the Windows® Media Center Windows® Media Center is a media application which allows you to use your UMPC as a hub for your home-entertainment system. It allows you to watch or record live TV; view photos and video clips; listen to music; burn CDs and DVDs; or watch/listen to streaming files, such as movies or music files, from the Internet. To use the Windows Media Center: 1. Connect your UMPC to an external monitor.
Using the camera The 2.0 megapixel camera enables you to take photos and video clips, as well make audio/voice recordings. Camera button Launching the camera To take photos or videos, do any of the following: • • Press the camera button located on top of your UMPC. Click > All Programs > ASUS Utility > LifeFrame. To exit the camera function, tap the Exit icon on the camera screen. Camera features Tap any of the tabs to view the thumbnails of existing photos, video clips or voice recordings.
Available capture modes Set your UMPC’s camera feature to any of these capture modes: Icon Capture mode Description Monitor Use this mode for video conferencing. Preview Use this mode to preview photos, video clips, audio/video recordings, or recorded video conferences. Camera Use this mode to take photos. Voice recorder Use this mode for audio/video recording. Silent camcorder Use this mode if you want to take videos without any camera sounds such as shutter sound.
Configuring the camera settings Use the following camera setting icons to configure the camera settings: Icon Description Shooting mode Tap to set to any of these shooting modes: Night Scene, Portrait, Slow Shutter, and Custom. Flash Tap to turn the flash mode on/off. Timer Tap to set the timer to 5 or 10 seconds, or tap to turn off the timer. Continuous Shoot Tap this icon to create a seamless effect when taking successive photos.
Using the Preview mode Use the preview mode to preview stored photos, and playback video clips, audio/voice recordings, or video conferences. To use the Preview mode: 1. Launch the Camera application. 2. Tap to set the mode to Preview mode. 3. Tap any of the tabs to preview photos, and playback video clips, audio/voice recordings, or video conferences. • • • • Tap the Camera tab the default tab. Tap the Video tab Tap the Audio tab Tap the Monitor tab to display the stored photos.
4 Getting connected In this chapter • Using Bluetooth • Using a 3G SIM card • Using GPS • Connecting to a wireless network
Using Bluetooth® Bluetooth® is a short-range wireless technology that allows your UMPC to communicate with other Bluetooth-enabled devices, such as PCs, mobile devices, headsets, GPS receivers, and headset, within a short range of about 10 meters or 30 feet. Bluetooth® devices only need to be within the specified range to exchange information and the devices do not need any physical connection. NOTE: By default, Bluetooth function is turned off on your UMPC.
Adding other Bluetooth-enabled devices You may use peripherals such as a Bluetooth printer, mouse, or keyboard with your UMPC. To add other Bluetooth-enabled devices: 1. From the Devices tab, click Add. The Add Bluetooth Device Wizard appears. Select My device is set up and ready to be found. 2. Click Next to start searching for other Bluetooth devices. 3. From the list of available Bluetooth devices, select the device you want to use with your UMPC, then click Next. 4.
Using a 3G SIM card (optional) Your UMPC allows you to install a 3G SIM card into your device, which enables you to wirelessly connect to the Internet so you can check your e-mail messages, surf the Internet, or chat online; and make and receive calls using a Bluetooth headset. IMPORTANT: Depending on the model, your UMPC may or may not include a 3G SIM card slot. Check your UMPC model if it contains the 3G SIM card slot. Installing a 3G SIM card To install a 3G SIM card: 1.
3. Replace the battery pack. Activating your 3G SIM card After installing the 3G SIM card into your UMPC, you first need to activate the 3G SIM card via the 3G Watcher application. To activate your 3G SIM card: 1. Launch the 3G Watcher application. To do this, do either of the following: • Click > 3G Watcher. • From the taskbar, double click the 3G Watcher icon . If your 3G SIM card has a default passkey, a pop-up window appears asking for your SIM card passkey. 2.
2. Click Settings. From the dropdown list, select your mobile service provider, then click Yes. The 3G Watcher returns to its main screen. 3. Click Connect to start the wireless connection. 4. The 3G Watcher displays the connection status. You may start to surf the Internet, or check your e-mail messages.
Switching on/off your wireless connection To switch off your wireless connection: • From the 3G Watcher main screen, click Tools > Turn Radio Off. To switch on your wireless connection: • From the 3G Watcher main screen, click Tools >Turn Radio On.
Using GPS Your UMPC comes with a built-in GPS transceiver and acts as a GPS device with its GPS function. CAUTION: DO NOT cover this area. It may interfere with the GPS signal. Installing an external GPS antenna (optional) We recommend that you install an external GPS antenna to get the best GPS signal reception. NOTE: Keep the external GPS antenna in a cool place when it is not in use. GPS Setting up the GPS function: To set up the GPS function: 1. Select > ASUSMAP GPS. 2.
Connecting to a wireless network With its wireless function, your UMPC allows you to wirelessly connect to a network. To connect to a wireless network: NOTE: Ensure that a wireless adapter is installed or plugged in your UMPC. 1. Double click the Wireless Console icon on the taskbar and select any of these icons: Icon Function Click to activate both wireless and Bluetooth functions. Click to activate the Wireless function only. Click to activate the Bluetooth function only. 2.
4. Select the wireless network that you want to connect to. 5. When connecting, you may have to key in a password. 5. After establishing a successful connection, the connection status is displayed.
5 Troubleshooting In this chapter • Troubleshooting
Troubleshooting Q A How can I turn off my UMPC when it hangs? A Press the Power button for four to six seconds. Q A What can I do when I cannot turn on my UMPC? A 1. Check if the battery is correctly installed and if the AC adapter is correctly connected. 2. Check the HOLD key. Check if the keys are locked or not. Q A What should I do when water gets into my UMPC? A 1. Do not turn on your UMPC. 2.
Q A A Possible solutions to recovering the system: 1. Uninstall peripheral devices and their drivers. 2. Update the BIOS. 3. Update the drivers. 4. Uninstall the unneccessary applications. 5. Reinstall the OS. 6. Contact a qualified service technician. Q A How to extend the battery life. A 1. Adjust the LCD brightness. 2. Adjust the volume. 3. Activate the power saving mode.
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Appendices In this chapter • Notices • ASUS Contact information
Notices Federal Communications Commission Statement This device complies with FCC Rules Part 15. Operation is subject to the following two conditions: • This device may not cause harmful interference, and • This device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to Part 15 of the Federal Communications Commission (FCC) rules.
WLAN and GSM/CDMA The UMPC only support WLAN and GSM/CDMA functions. It does not support voice transmission function. Australia SAR requirements When using a wireless LAN or GSM/WCDMA adapter, the adapter and integrated antenna shall be positioned not more than 20 cm from your body or nearby persons during the duration of the GSM/WCDMA transmission.
To prevent radio interference to the licensed service (i.e. co-channel Mobile Satellite systems) this device is intended to be operated indoors and away from windows to provide maximum shielding. Equipment (or its transmit antenna) that is installed outdoors is subject to licensing. Because high power radars are allocated as primary users (meaning they have priority) in 5250-5350 MHz, these radars could cause interference and/or damage to license exempt LAN devices.
Departments in which the use of the 2400–2483.
UL Safety Notices Required for UL 1459 covering telecommunications (telephone) equipment intended to be electrically connected to a telecommunication network that has an operating voltage to ground that does not exceed 200V peak, 300V peak-to-peak, and 105V rms, and installed or used in accordance with the National Electrical Code (NFPA 70).
Nordic Lithium Cautions (for lithium-ion batteries) CAUTION! Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer’s instructions. (English) ATTENZIONE! Rischio di esplosione della batteria se sostituita in modo errato. Sostituire la batteria con un una di tipo uguale o equivalente consigliata dalla fabbrica. Non disperdere le batterie nell’ambiente.
ASUS Contact information ASUSTeK COMPUTER INC. (AsiaPacific) Address Website Technical Support Telephone Support Fax Software download 15 Li-Te Road, Peitou, Taipei, Taiwan 11259 www.asus.com.tw +886228943447 +886228907698 support.asus.com* ASUS COMPUTER INTERNATIONAL (America) Address Telephone Fax Website Software download 800 Corporate Way, Fremont, CA 94539, USA +15029550883 +15029338713 usa.asus.com support.asus.
