Writing a post after several months
You may have come across this problem. Usually when you install Windows 7, if you need to install XP as dual boot you need to bother a bit. Either you can try installing XP into another partition and later repair the boot manager by booting with a Windows 7 DVD and choosing Repair. Or the safe way is to install XP first and then WIndows 7.
However it’s not the case now. Once Windows 7 is installed and you need to completely remove 7 and install XP. You may have done this successfully in some times and some of you may have come across a problem. When you boot with a Windows XP disk you’ll end up with a Blue Screen. So some of you may say “Can’t Install Windows XP to a hard disk which Windows 7 has been installed ” .
Solution is simple. Go to BIOS setup and look for “SATA Configuration”.
There you may see AHCI is selected. There select “ATA” or “IDE”, save and reboot. You are done
Think this may be helpful for you all someday.
Check the following links for more info :