What should i do when i have installed win xp on win7

[engineer61]

Hello,
i have installed win xp after win 7 , and my compuer doesn,t boot , what can i do?

 

[engineer61]

Boot off of the windows xp disk and do a repair... then the same with your win 7 disk.

thank u for your reply. i have found that i should copy ntldr and ntdetect files from win 7 cd to system partition.