グループポリシー
When a policy is "Enabled", Group Policy will add the 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.