I have read several of the past posts on this and still this isn't working. My wife has a new PC laptop computer that she uses for her business accounting software. The software needed will only work in a windows environment. She tried using the parallels software and that was problematic from the get go, so we are trying the PC laptop route. The iMac is a late 2011 model with Thunderbolt ports. The new laptop also has a thunderbolt port. It is an ASUS gaming computer. In theory I should be able to hit command F2 and it works, but no such luck. Am I missing a setting?