No, I purchased from a reputable store. Cost was over 100 dollars, U.S. I did a clean install on a formatted HDD. The install went all the way through to after win 7 screen came up. I was entering my key code when an error message from Microsoft came up saying I had already installed once and the install stopped. There is no win 7 on the system.
Contact Microsoft, it looks like it's going online to check the code and found it was used already.
I know there is a MS outreach rep on here, she'll probably confirm this.
If you want to install, try disconnecting the PC from internet connectivity, that will prevent it from checking the code at this time. But at some point you will need to register Windows, and you will probably get the same type of error then.