gpedit.msc win 7 enterprise

[koppany]

For student account I blocked command prompt and control panel in gpedit.msc. Now I'm not able to access gpedit.msc even in my adminstrator account (students changed something settings).
Error message: Failed to open GPO. You may not have appropriate rights. Details: Unknown Error
Now I'm not able to get back my command prompt and control panel and safe mode doesn't help me as well.
Any idea how to solve that?

 

[aford10]

Get on a computer, or log in with an account that the GPO hasn't been applied to and change it. It depends on the scope it was applied to.

The other option is to change your local security policy.

 

[koppany]

OK. I have found the solution: Go to Windows\System32 folder. Here we need GroupPolicy folder that is hidden and we haven't control panel to show hidden files so type next one: Windows\System32\GroupPolicy. From user folder delete registry.pol file. And finally we can access gpo again. Of course every gpo settings are lost. We have to set them again.