Hi I recently installed windows xp on Vista loaded system as dual boot. i am able to install xp after changing the sata settings in the bios from "a" to "b"(don't remember names ) . Now I can see both OS when restarting ,but problem is each setting in bios is for one OS ,I mean if change the settings to "a" then I can go to xp and when i tried for vista with sata settings as "a"it showing some blue screen. Same way if I change the setting to "b" then I can go to vista but not to xp. How can I solve this problem ? Its really pain to go bios settign each time I want to switch the OS

You will need to reinstall xp when only the vista drive is bootable. Google how to install xp after vista for the how to.

what do you mean vista drive is bootable? Vista is working fine when I loaded xp