I am running Parallels Desktop for Mac 7 and Windows 7 on my MacBook Pro running Lion (10.7.3). When I try to shut down my MacBook Pro, it gets to the grey screen and the wheel spins and spins. It never shuts down anymore. I have to force it to shut down. When I reboot, everything is fine (until I shut down again). Someone suggested Parallels can cause this. Anyone experience this, and if so, how did you fix it? FYI - I have reset the PRAM and also repaired the disk permissions. Neither helped.