User Manual

Managing Virtual Machines 109
VM Flags tab contains various options that influence the performance of the virtual machine and
startup configuration options.
Emulation flags:
 Acceleration level. Acceleration enables a number of the guest OS specific performance
optimization techniques. We recommend selecting the
High level. If you notice incorrect
guest operating system behaviour while running with high acceleration, for example when
installing software, shut down the OS and lower acceleration level. Note that without
acceleration at all (
Disabled level) the virtual machine runs very slowly. We recommend
turning acceleration on after finishing the process that caused problems.
 Enable hardware virtualization support option is available for editing if you have on your
host computer either an Intel processor with Virtualization Technology or an AMD
processor with Security and Virtual Machine architecture. By default hardware acceleration
is enabled. See
Intel Virtualization Technology (VT-x) and AMD SVM Support (page 10)
to learn about hardware virtualization support in Parallels Workstation.
If you run a guest OS with VT-x support, it is indicated in the About Parallels Workstation
screen (see the
More Information (page 143) section).
Process priorities:
Note: Process priorities options are available in Windows primary OS only.
 When running in foreground. This option specifies priority of the virtual machine process
when running in the foreground mode, i.e. when the virtual machine window is active.
 When running in background. This option specifies priority of the virtual machine process
when running in the background mode, i.e. when the virtual machine window is inactive.
Misc flags:
 PC speaker support enabled. If this option is enabled the virtual machine can indicate its
actions by PC speaker sounds.
 Autostart VM when configuration is loaded. After you open the virtual machine configuration
file, the VM will be automatically started.
 Switch to fullscreen mode automatically. As soon as the virtual machine is started, it will run
in the fullscreen mode.
 Exit application on VM shutdown. If this option is enabled the Parallels Workstation window
is closed automatically after the virtual machine is stopped using either guest OS shutdown
command or Power Off
button, or it is suspended. By default this option is disabled.