I have an old custom built PC that I bought from someone on ebay a long time ago. The PC is not a specific brand like HP or Dell. I've seen that it is difficult to transfer an old hard drive from a brand name computer to a new custom built one. I have not seen information on going from a custom one to another custom one. Is this possible? I can list specs of both computers, but all the parts are going to be different. The operating system I have on it is Windows 10, though. I was not planning on buying an SSD for a while as I reached my budget and was planning on doing it at a later date. Hopefully, someone can tell me if this is possible and what I need to do. If I have to... I wouldn't mind backing up the data I need, formatting the HDD, and doing a fresh install. I'd have to create an installation flash drive of windows 10 and find my product key, but I'd prefer not to do this. I would prefer just to be able to simply put it in my new PC.