Hello, After getting tired of being bugged by the beg-screens to upgrade Parallels to version 5, I stupidly did this ... now my previous perfectly working virtual machine with Vista-64 no longer works. Never fix a working system... It only makes the drive available on the Mac desktop, but I can only start Windows in Safe Mode - which is basically useless. Otherwise, I just have a small black screen with the VM name listed. Playing with the OS settings, memory settings etc. bring no luck and it is set to use one processor only. Does anyone perhaps have some tips for me? (Other than becoming alcoholic through desperation ... lol ) Many thanks ..