I am currently using XP Media Center as my OS and I had partitioned Vista Beta but have recently unpartitioned it and put the space back to my C: drive. Now when i boot up, the message asking me what os i want to use is still there and it was defaulted onto vista. When i click it , the error message states that is it simply not installed and that i should install it. However, I want it gone so that Media Center will boot up normally on its own like it used to. What can I do to fix this?