From the blog post
http://thedatafarm.com/tools/reusing-a-virtual-machine-with-windows-7-and-handling-genuine-windows-issues/
Open a command prompt as admin and typing slmgr -rearm and restart OS.
http://thedatafarm.com/tools/reusing-a-virtual-machine-with-windows-7-and-handling-genuine-windows-issues/
Open a command prompt as admin and typing slmgr -rearm and restart OS.