So will start with resetting the domain level Group Policy.
1. Log on as a domain administrator to one of you Domain Controllers.
2. Start a command line session.
3. To reset the Domain GPO, type
To reset the Default DC GPO, type
To reset both the Domain and Default DC GPOs, type
4.After you enter the appropriate command in Step 3, enter Y to both prompts.
5. Close the command window.
Use the command-line tool dcgpofix:
When using Exchange, you should also read the following:
Now for resetting the local GPO account that’s a bit different:
To Reset “Local Group Policy” to Default using a VBS File
NOTE: You must be logged in as an administrator in Windows to be able to do this option.
1. Click/tap on the Download button below to download the VBScript file below, then run it.
2. If prompted, click/tap on Open.
NOTE: If you like, you can stop getting the Run prompt by unblocking the downloaded .vbs file.
3. If prompted by UAC, then click/tap on Yes(Windows 7/8) or Continue (Vista).
4. The Local Group Policy Editor has now been reset back to default.
Hope this help you,