Hello. I have a big problem and I hope someone can help.

Situation is as follows:

I am an Administrator on this computer running Windows XP Pro SP1. Till
recently I had no problems accessing Local Security Policy options in
Administrative Tools, however since 2 days ago I can't access it anymore.
When I click on LSP icon I get:

Group Policy Error

You do not have permission to perform this operation.

Details: Access is denied.


I tried everything but I just can't get it to work. I can access all other
tools in Administrative Tools folder except Local Security Policy. Here is
the screenshot of the error:

http://img156.imageshack.us/img156/1300/problemnk4.jpg