how about telling windows it is already registered:
Click on start-Run
1)enter regedit
2HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Welcome\
CurrentVersion
RegDone
set the value to 1
3HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Welcome\
RegWiz
add new string
Set string name to @
set value to 1
TADAAAA!! you are registered and uncle bill doesnt know