Group Policy
The only Group Policy settings available for AutoRun affect the NoDriveTypeAutoRun Registry entries. The policy is available on either a per-machine or a per-user basis reflecting the Registry entry location in either HKLM or HKCU. As described above, a per-machine policy setting will cause the per-user policy setting to be ignored.
When a policy is Enabled, Group Policy will add the NoDriveTypeAutoRun entry to the Registry. If the policy is Disabled or set to Not configured, Group Policy deletes this entry from the Registry for the Machine policy (in HKLM) and sets it back to system defaults value for the User policy (in HKCU). System defaults may then take effect as described in the NoDriveTypeAutoRun section.
The policy names, locations and possible settings vary slightly between Windows versions. The list of settings are relatively short and are always additional to the system default setting. Therefore, on Windows 2000, enabling the "Disable Autoplay" policy and setting it to "CD-ROM drives", disables AutoRun (as distinct from AutoPlay) for CD-ROM and DVD drives, removable drives, network drives, and drives of unknown type.
This setting cannot be used to enable AutoRun on drives on which it is disabled by default or disable AutoRun for drives not listed. To disable or enable any particular drives or drive types, the Registry must be edited manually.
Read more about this topic: AutoRun
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