Around the same time that VMware updated its Workstation product with a new refresh build, Microsoft also updated both of its hosted virtualization platforms, Virtual PC 2007 and Virtual Server 2005 R2, with Service Pack 1 updates. As we all know, Microsoft is really pushing their Hyper-V technology. So why are they updating "legacy" virtualization technology? The fact is, it doesn't look like there are any new Around the same time that VMware updated its Workstation product with a new refresh build, Microsoft also updated both of its hosted virtualization platforms, Virtual PC 2007 and Virtual Server 2005 R2, with Service Pack 1 updates.As we all know, Microsoft is really pushing their Hyper-V technology. So why are they updating “legacy” virtualization technology? The fact is, it doesn’t look like there are any new interesting features added to either product. No, instead, Microsoft is making sure that these two platforms are able to work with newer operating systems. Don’t forget, these platforms are free, work extremely well, and have been downloaded a lot! Remember, it was only a few short months after releasing Virtual PC 2007 back in February 2007 before it reached over 2 million downloads.Also keep in mind, not everyone has the luxury of upgrading their hardware to the latest AMD-V or Intel VT virtualization technology chipsets. So if you aren’t running the latest and greatest 64-bit virtualization enhanced processors, you may not be able to run Microsoft’s Hyper-V. But you can still join the millions who have downloaded Virtual PC 2007 and Virtual Server 2005 R2 and still run the latest Microsoft operating systems with the Service Pack 1 updates. When you upgrade your environment, make sure that none of your virtual machines are in a suspended or saved state as that may cause corruption of your virtual machines. Also, be prepared to also update your virtual machines to the latest Virtual Machine Additions.The new release of Virtual PC 2007 SP1 introduces support for the following:Windows Vista with Service Pack 1 (SP1) Business, Ultimate, and Enterprise operating systems as a host operating system Windows Vista with SP1 Business, Ultimate, and Enterprise operating systems as a guest operating system Windows Server 2008 Standard as a guest operating system Windows XP with SP3 as both a guest and host operating systemThe new release of Virtual Server 2005 R2 SP1 introduces support for the following: Additional host operating system support that includes Windows Server 2008, Core Edition, Standard Edition, Datacenter Edition, Enterprise Edition and Small Business Server And nonproduction host operating system support for Windows Vista Ultimate with Service Pack 1 (SP1), Windows Vista Business with Service Pack 1 (SP1), Windows Vista Enterprise with Service Pack 1 (SP1), Windows XP Professional with Service Pack 3 (SP3). Guest operating system support for Windows Server 2008, Core Standard, Datacenter and Enterprise Editions, Windows Server 2008 Small Business Server, Windows Vista Ultimate with SP1, Windows Vista Business with SP1, Windows Vista Enterprise with SP1 and Windows XP Professional with SP3.Download Microsoft Virtual PC 2007 SP1. Or download Microsoft Virtual Server 2005 R2 SP1 Update. Software Development