I run windows XP using Parallels 5 on my mac. I typically run it in its own window. I have noticed that if Parallels is running but not used for a while everything freezes. I can shut down Parallels but it does not appear windows stops. I get the black screen that has windows xp on it and the rotating apple thinking graphic. If I close parallels when I reopen it and launch windows I get the same screen. The only way to get it to work is to restart the computer. Any ideas? This is totally irritating.