ok kairozamorro i will try it and thanks
Addendum:
it didn't work
i downloaded the NTDETECT + ntldr files from Neosmart and pasted them in D: (which is where XP is Installed)
when i try to enter XP i get a msg (NTDETECT failed)
and then i copied the same files from my XP Installation CD and when i click on XP the computer just restarts
and i tried without these files, it asked me to repair windows but in order to repair i need to enter administrator password, which i do not know what it is because i didnt create admin username or password!!!!!!!?