I have an illegal request.

Hello, I think I might be in the wrong subreddit, but I can't find any other that suits my needs.

I was forced to get a new PC, after my old one got stolen, with the limited budget that I had, budget which hadn't included the OS (that I had paid for on the computer that got stolen). Now, I have 30 days of Windows 7, and I need another solution other than spending way too much for the OS. Where can I get this illegal solution?