Hyper-V Program Manager
On a running virtual machine (under Virtual PC) you can see the optimization level being used by selecting 'Properties' off of the 'Action' menu - and then going to the 'Advanced' tab. There are three possible optimization levels:
Any chance to get 'Windows 7 Professional SP1' from MSDN work as 3. User and kernel mode optimization ? I have tried latest VM Additions version 13.823 and it still does not work. Windows 7 is the only x86 edition you can install Visual Studio 11 preview into :-/ Windows Server 2008 SP2 runs fine with both optimizations in Virtual PC.