How To Disable CD autoplay completely in Windows XP Home
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Click Start, Run and enter REGEDIT Then go to:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer]
Create a new value called: NoDriveTypeAutoRun
Type is: DWORD
Value is: 0x000000b5 (181)
You may need to log off/log on or reboot for the change to take effect. Additionally, you may need Administrator privileges to edit the Registry.