I am the person who asked the original question. As I haven't followed the product very closely, I was not aware that there was a version 6.1. I have an old copy of 6.0, and I knew that m$ had purchased Virtual PC and came out with version 7.x. I guess that I should re-ask my original question. I will soon have a new Powerbook 1.67 Ghz and, in addition to Mac OS X, I need to run Solaris 10 x86. Should I stick with Virtual PC 6.0, should I hunt down a copy of 6.1, or should I purchase a new copy of 7.0 from m$??? Thanks, Jerry K Chris Olson wrote: > On Dec 19, 2005, at 9:35 AM, Dr Trevor J. Hutley wrote: > >> I get the impression that with Microsoft it has not progressed. > > > The main reason Microsoft bought VirtualPC is as an emulation layer for > backwards compatibility of legacy software in Windows Vista when they > transition to the WinFS database-style file system. The Mac version > just happened to be along for the ride. It'll eventually be dropped > from their software lineup for Mac. > > There were lots of pirated copies of VirtualPC6 floating around on the > internet. VPC6.1 broke the serial number hack that allowed the pirated > copies to run. VPC7 added token support for the G5 processor with no > AltiVec support and a "fix" for the G5 not supporting pseudo > little-endian mode. It's slower than the proverbial molasses in > January compared to VPC6 on a G4. > > There has not been one performance enhancement to VirtualPC since > version 6.0