I have been getting the error ""Hdd file is missing, corrupted, or used by other application" frequently. I have taken the steps to resolve it found here: http://kb.parallels.com/en/4680 It fixes it after I do that, but it came back within 15 minutes of me fixing it. Parallels crashed one time, and I restarted it and then boom, error is back. What causes this? How can I prevent it. Will upgrading to parallels 6 fix a bunch of these issues? Also, in the resolution for this error, it has you copy and paste the .hds file and rename it, and boot up from it. The old corrupted "windowsxp.hdd " file is still there taking up like 7 gigs of space, can I delete that once I create the new .hdd file?