I'm new here so not sure if this is the right place but am hoping someone can help me out. I bought what appeared to be a genuine Windows 7 Pro from Craiglist to save some money - it was shrinkwrap and had a COA outside. I installed this on a new laptop I got for my sister oversees. It installed and registered fine. A couple of days ago, I was curious to see how the 64-bit version works (since I have MAC at home) and tried to instal it on my own virtual machine and used the same product key to register. It didn't take it and it wasn't a big deal since I was only testing. Anyway, I got an email from my sister a week later saying when she did a windows update, it came back saying the OS was counterfeit. (Coincidence?) It's been over 2 months since I installed it on her laptop. COuld what I did on my VM triggered that notice? If so, what recourse do I have? I have since them uninstalled the 64-bit version on my system since I have no need for it. Moreover, was I sold a dud? Hopefully not.