I updated to the newest version of Parallels 8. I run Windows 7 and it comes up and immediately goes to the Parallels tools installer, as usual. When Parallels tools is complete, the system reboots and I get a black screen. I can press ctrl-alt-del and get a menu. But when I login, I get black screen. If I start over from my backup file and abort the Parallels tools install, Windows 7 runs fine.

I can get my latest VM file from the back-up and the process is just repeated.

Is this a known bug in parallels tools? Can I get a newer version?