I have a Dell E6500 laptop dual booting XP Pro and Vista Ultimate 32-bit. All of a sudden, when it just about gets to the Vista logon screen, the laptop reboots cna continues to recycle. The XP Pro side works great. I'm not sure what else I need to post. I've already re-installed the Vista U side on this laptop recently three times, initially for this same issue. I thought I had it fixed. Any ideas are greatly appreciated.