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#1
Running a real install Virtually
For Mac, there is a program called Parallels that runs VM. One feature it has is if your Mac will dual boot to OS X and Windows, it will run the Windows install instead of making you set up a virtual OS. The only catch is you have to register it when it runs as the VM even if you registered the real run.
When you change one, it changes the other, so if you shut down OS X, and boot to Windows, the changes you made to the virtual ver really happened to the OS...
Is there a VM that can do that on a Windows machine?