I installed windows 2000 and now windows xp no longer works

So, I already had windows xp but i decided that i also wanted windows 2000. I installed windows 2000 on a separate partition and i thought that wouldn't affect my windows xp install. But now when i try to boot into windows xp the windows 2000 startup screen appears and has an error message. But windows 2000 still starts up fine.
Here is a picture of the error message