I need some help. I'm unable to elevate on Windows 7 RC. When I click on a shield icon nothing happens. If I run a command line tool such as 'regedit' that requires elevation from a command prompt it displays a message box that reads "The system could not find the environment option that was entered". I have also noticed that serveral of the utiltiies that contain paths such as "%windir%\system32\" do not work as they are unable to resolve %windir%. It seems that WINDIR is no longer registered as an environment variable on my system. This is confirmed by using SET from the command line but without access to regedit I can't make any permanant changes. The last time it was working, I had just changed some custom environment variables. My best guess is that something got corrupted when writing out the updated environment variables. Those custom environment variables are working as expected. I don't know have any idea why WINDIR disappeared or if WINDIR is the only thing preventing elevation from working. The user account is on a domain, however when I tried a local account on this same computer it had the exact same problem so it must be a system setting, not a per user setting.