I was running Windows and all of a sudden, the screen went grey and said your computer has restarted, and offered for me to reopen the apps I was using, then parallels offered me to send an error report, saying it recovered from a serious error. I have been getting nagging messages to upgrade to 9, saying it will not run on maverick, but I am running mountain lion, so I have seen no need to upgrade yet. Before this it decided to compact my virtual machine and I let it do this, and all was fine, until last night with the sudden restart. is paralells doing odd stuff deliberately so that I will upgrade? I am running this on a 2011 mac mini running running 10.8.5.