Technical data

26
User and Remote Interface Security Measures
USB Interfaces
Figure 7-1 Autorun Flag Definitions for NoDriveTypeAutoRun Registry entry
As shown in Figure 7-1 above, the default Windows XP (post-SP2) and Windows 7 value for this entry is
0x91 (under the entry HKCU\...\NoDriveTypeAutoRun). This setting disables Autorun for Unknown
and Network drives, but enables Autorun for Removable, Fixed, CD/DVD or RAM drives.
You can disable Autorun for all drive types by changing the value to 0xFF, as described in the following
section.
Disable & Enable Procedure
In view of the interaction between the per-machine and per-user Registry settings, as described above, it is
recommended that, if both keys exist in your instrument’s Registry, you should alter the settings of both
Registry keys to the same value at the same time.
Use the following procedure to disable Autorun for all drive types, or to revert all Autorun settings to their
Windows XP or Windows 7 default values. (Note that if your test set has a Windows 7 operating system,
there is a simpler way to do this via the Control Panel; see “Windows 7” on page 24.)
1. Open the Windows Registry editor, using one of the following methods (depending on your test set’s
operating system):
a. For Windows XP, select Run... from the Windows Start menu. Then, type regedit into the Windows
Run dialog box, as shown in Figure 7-2 below, and click OK.