ROFL,
Reminds me of my first go at RestrictRun policies on NT. I had the logic backwards, specifying NotePad as being the 'restricted' program. Logoff/logon and nothing BUT notepad would run. DOH! Thinking... time to reformat/reinstall... there had to be another way...
Sparked up NotePad and through file dialog renamed regedt32 to notepad. Whew! Narrowly pulled my ass out of the fire.

Afterwards (long afterwards) I came to the realization that I could have remotely edited the reg. I came this ' ' close to reinstall.

After more than a few close calls locking myself out of NetWare servers, I learned to stay logged in at another wks JIC.

I trust you had another admin account to save your ass.
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Give a man a fish and he will be back for more. Slap him with a fish and he will go away forever.