Virtual PC 2007:
http://www.microsoft.com/windows/products/winfamily/virtualpc/default.mspx
Virtual Server 2005:
http://www.microsoft.com/windowsserversystem/virtualserver/software/default.mspx
- Both FREE,
- Both from MS,
- Both can run on Windows XP, Server 2003 (no support for VISTA for Virtual Server 2005 R2)
Q:
So what's the difference?
A:
Which OS should be hosted ! Virtual PC is meant to host PC versions of the OS while Virtual Server is meant to host Server versions of the OS
If you want to try the latest servers from MS, download the VHDs for Exchange 2007, SQL Server 2005 or Windows Server 2003 directly from:
http://www.microsoft.com/technet/try/vhd/default.mspx
Enjoy :)