if you want to lock your registry and you don't want anyone install something in your computer, you make an account as an administrator and let ppl use guess account ( xp, win nt, win2k ). or pehpas you can link
http://www.freedownloadscenter.com/P...nd_Components/ Application_Locker.html or
www.totalshareware.com/ASP/ detail_view.asp?application=1918.