Virtual PC is a powerful software virtualization solution that allows you to run multiple PC-based operating systems simultaneously on one workstation, providing a safety net to maintain compatibility with legacy applications while you migrate to a new operating system. It also saves reconfiguration time, so your support, development, and training staff can work more efficiently. More info »
Virtual PC and "Windows XP Mode + Windows Virtual PC" is the same and should be merged.
I use this because MS gives free time limited VMs for older versions of IE.
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