There are numbers of websites which are offering windows 7 professional keys. I was searching a to buy a legitimate windows 7 professional, i come with the websites are offering cheap keys yet they claim they are legit. Do i buy a windows professional key from them and download the iso and make it a legitimate from Microsoft. Or microsoft Bans me from not to buying a key from their store.
If you buy from one of those sites and get a counterfeit/bad license key, I don't believe Microsoft will ban you from buying from their store.
I believe the worst that will happen is that either Windows will not activate when you install it or it might activate but then latter flag as 'not genuine Windows"...and the end result is that you likely will have to buy Windows again if it is in fact a counterfeit key.
This is why I tend to buy Windows from a trusted source such as Newegg or Amazon (but with the seller being Amazon.com not some other seller on Amazon).