5 stars (I can't believe I haven't tried this before) - I've been using computers for 25 years, so I'm a bit jaded and not easily wowed. However, using Virtual PC 2004 has wowed me. I've stayed away from this kind of software in the past because I worried that it would run very slowly. I was wrong. I have now created two virtual machines, one Windows XP Pro and one Linux distro (PCLinuxOS) and I couldn't be happier. Not only can I run other operating systems without rebooting, but they run nearly as fast as normal. Even better, I can close them into a kind of hibernate mode so that the next time I start them up they are right where I was before. I have also set up the undo disk feature. With that, if I screw something up I can just decide to not save any changes to the virtual machine. So, if I get a virus it doesn't do any damage. If a software install trashes the system it doesn't do any real damage. Finally, I can access my host PC from the virtual PC to exchange files just as I would on a normal network. I highly recommend this software. Get the 45-day trial version first, and then I'll bet you buy a copy just like I did. 5 stars (I am loving it!) - Yesterday evening I downloaded the virtual pc 45 day trial from microsoft to try out on my tablet pc. Within an hour, using only my net connection (no floppy, no cdrom) I had a running Debian Linux system. This really rocks! I have already placed an order for the licensed package here on Amazon. 4 stars (Using Minix on Virtual PC for Windows free demo version) - My interest in Virtual PC is for experimenting with the Minix operating system without repartitioning the hard disk. Minix is meant for educational use, and university lab PCs are not always available for dedicated use. I downloaded the free VPC for Windows demo. I found VPC easy to install on a Windows 2000 system. However, the link to Microsoft support on the startup page did not work for me. Installing Minix on a VPC virtual disk was anot... Microsoft Software :: Cross Platform :: Disk Drive Partitions (Hard) :: Diagnostics (Diagnostic) :: Maintenance :: Utilities :: Computer software (programs) :: Compatible (Compatibilit :: Microsoft Virtual PC 2004