Turn off autorun USB

Turn off autorun on USB Drives in windows XP and prevent USB viruses

USE GROUP POLICY
Windows Server 2008 or Windows Vista
1. Click Start
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the Start button
, type Gpedit.msc in the Start Search box, and then press ENTER.
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User Account Control permission
If you are prompted for an administrator password or for a confirmation, type the password, or click Allow.
2. Under Computer Configuration, expand Administrative Templates, expand Windows Components, and then click Autoplay Policies.
3. In the Details pane, double-click Turn off Autoplay.
4. Click Enabled, and then select All drives in the Turn off Autoplay on box to disable Autorun on all drives.

USE REGISTRY
Click Start/Run Type regedit
find registry key subkey:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\
interchange NoDriveTypeAutoRun value into value which depend on the feature you want to disable.
Autorun is also known as AutoPlay. The following table shows the settings for the NoDriveTypeAutoRun registry value.
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REG_DWORD Value Meaning
0x1(1) Disables AutoPlay on drives of unknown type
0x4(4) Disables AutoPlay on removable drives
0x8(8) Disables AutoPlay on fixed drives
0x10(16) Disables AutoPlay on network drives
0x20(32) Disables AutoPlay on CD-ROM drives
0x40(64) Disables AutoPlay on RAM disks
0x80(128) Disables AutoPlay on drives of unknown type
0xFF(255) Disables AutoPlay on all kinds of drives

You can choice NoDriveTypeAutoRun=1 or 80 or ff...