Yesterday I was notified that an upgrade to 6.0.11992 was available. An d then a journey began which let me finally turn away from Parallels. I am a very experienced programmer using Parallels Desktop for MAC since version 3 running 2 XP SP3 boxes and one Win7 box using them daily. I always had problems after the upgrades mostly with the reinstallation of parallel tools in the XP boxes but this time it was a nightmare! All three boxes crashed with different errors: After using backups I finally got them to work but experienced extremely unstable conditions. I am talking here about 3 boxes which were used daily without any problems before the upgrade to 11992! I experienced constant crashes of explorer.exe and numerous other programs. Now after nearly 20h of constant tweaking and trying I give up. sorry parallels-team but I am quite confident that version 6.0.11992 will trash your credibility as a company which cares for their customers. This upgrade should have never been released period.