I have Parallels 6 for Mac and installed XP. It worked great for the first week then I downloaded SP2 and XP was slow for several days to the point of where I couldn't even use the Internet Explorer browser because it was stuck in processing. Then after a few days it worked normal. I used it another week then it started downloading SP3 a over week ago and has been sluggish ever since to the point of where I can't use it again. Any suggestions to fix this besides starting over again by reformatting?