winstartup folder

[sps0410]

i found a you tube video telling how to change the welcome screen message "welcome" in vista....
the video says to copy the winlogon.exe.mui to winstartup folder.
nw d problm is i cud nt find the startup folder ..
can anbdy knw abt it......
plz help,,,,
the link of video is----http://www.youtube.com/watch?v=3Tv_vjQd7Rc

 

[lemur]

I wonder if you could run system restore to a previous date?