If your PC has been “locked down” from a nasty malware infection you can remove almost all the restrictions by deleting registry values found in this key:
*Before you modify your registry be sure to back it up first by viewing this article*
HKEY_Current_UserSoftwareMicrosoftWindowsCurrentVersionPoliciesExplorer
There should not be any values in that key, especially ones that start with No.
If you can’t access your registry editor please refer to this post on how to re-enable it.
