Date: 2012jun19 OS: Windows Warning: Vista isn't current any more Q. I have the Window boot manager (MBR?) on an XP disk and Vista on another disk. How can I remove the XP disk and boot from the Vista disk? A. I am no expert but this worked for me. - Disconnect the power from the XP disk. - Boot to your Vista install CD. - Select the "Startup Repair" option. - Remove CD, reboot I read elsewhere that you need to do this three times for Windows 7 but once was enough for me.