thumb drive virus spread mostly by using autorun.inf file on the root directory of your thumb drive. you can check whether that file exist in your thumb drive by typing ��dir f: /a/p�� on the command prompt if your thumb drive is drive F. Disable autorun.inf of your windows XP by doing the following: REGEDIT4 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\IniFileMapping\Autorun.inf] @="@SYS:DoesNotExist" paste the text above into a file call da.reg and double click it . If registry editor was disable by the virus, do the following : click start, run, highlight and paste the following into it : REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableRegistryTools /t REG_DWORD /d 0 /f Please be remind that there are viruses that hide your folder and create a .exe file (that is a virus) on your thumb drive : example : if you have a folder call mp3, it will create a file call mp3.exe with an icon that looks like a folder, you can check whether this kind of virus exist by typing ��dir/a/p�� on your command prompt. some virus create a directory call ��recycler�� on your thumb drive and hide inside, remove that directory with the command ��rd /s recycler�� on your command prompt (you can only see the directory using the dir/a/p command) The best and only way to prevent thumb drive virus is to use Linux only to open your thumb drive, puppylinux is a good one.