So I had Vista 64 bit up and running for a few weeks. Today I thought it would be cool to dual boot with XP. I put in my xp disc and was going to make a new partition. For some reason, I wasn't able to make a new partition. Then I tried to boot back into Vista. I got a "error loading operating system" message. I did some searching and found that the problem is xp wrote over the vista boot record. The only solution I have found is to reinstall Vista, which I really don't want to do. Is there another solution other than reinstalling Vista?