Okay so I bought a computer at best buy or whatever and it had windows 7 preinstalled on the HDD. Fast forward 7 years or so. I've upgraded everything in the computer but I'm still using the hdd. I got the windows product key using a program and reinstalled windows 7 on a SSD and I still have the original copy of Windows on the HDD. And it says that this copy of windows isn't genuine, I can't afford to get a new copy of the OS but I will later when I can. Is there any way I can prove that it is the genuine copy of windows and stuff?