To check or set the registry key:
Click Start > Run and in the Open box type
Regedt32 on a Windows NT machine). In the Registry Editor, navigate to the registry key.
Note: You should not edit your registry unless it is absolutely necessary. If there is an error in your registry, your computer may not function properly. To safely use Registry Editor for tasks such as deleting duplicate entries or deleting entries for programs that have been uninstalled or deleted, you should be prepared to both edit and restore the registry. For instructions, see the Windows Registry Editor help.