mattyk41, Check out the link below.
Registry Editing Has Been Disabled By Your Administrator
Step by Step Methods for Fixing Registry Editor.
and it has locked me out from changing it. Initially, I was unable to access my task manager screen until I ran Windows onecare scan. it cleared up the virus but I still cannot get into my regedit (it states registry editing has been blocked by your adminstrator). My background change occurred as a part of this virus....
Any suggestions on how to get back to where it once was?