My computer info- Mac OS X Version10.4.11 Processor 2.33.GHz Intel Core 2 Duo Memory 2 GB 667 MHz DDR2 SDRAM Parallels Desktop For Mac - I don't see a version on the disc or packaging, but I know it's a couple years, or so, old. Anyway, installed Parallels, but when I go to install the Windows when I get to the step of "Start the Virtual machine by clicking the Power On button" the screen has a grey screen comes down and it shows a box basically telling me how to force quit the computer. I'm sure I left out some vital piece of info you need but this is all I can think of to post, so if I missed something, ask away. Brenda