windows 7 professional product key i need

[moore3o5]

i was in my college library and met this random computer science major and he put windows 7 professional on my computer for free.he downloaded it from our school computer major website and i dont know how he did it. now 30 days later i need a product key that i dont know. so can i plz get a porduct key for WINDOWS 7 PROFESSIONAL I NEED A PRODUCT KEY

[dr.nil]

Welcome to TechArena moore3o5.

We do not entertain this kind of requests, in case you have to install windows 7, download a demo software or purchase from microsoft.
For more details, please visit this site Buy Microsoft Windows 7

You will have to contact Microsoft from any of above links or here: http://www.microsoft.com/windows/windows-7/ to obtain cd-key for your product.
We request you not make further threads about requesting for software which are paid (this is piracy and techarena is against the same).

I hope you understand, kindly PM me in case you have any issues.