There are 3 OSs on my machine. WinXP 32-bit, Vista x64 and Windows 7 x64 on different HDs. When i used Windows 7 sometimes and want to start vista, then comes a blue screen ... registry reading error. WinXP and Win7can boot.There is a little unused volume on the first partition on the WinXP HD. When i format thisvolume then i can boot vista without problems.Why? What is the problem? Can sombody help?Thanks.

This is probably because the NTFS implementation in Vista, XP and Win7 is diferent. What I have tried successfully is to have XP in a diferent disk and boot to the disk I need using the PC's BIOS functions, a good cheap solution, image your installation and deploy it to an unexpensive disk that would hold your data or even leave some room for expansion.Regards