I have a computer that was designed and built by a friend of mine who is a computer builder. I bought the parts, and let him handle the rest. After a few months of owning the computer, it began crashing while playing Skyrim: special edition, so I played other games. Recently my computer began crashing while playing any game on steam after about 5 minutes. Sometimes it blue-screens, sometimes it just crashes the game. I have tried some methods to fix this but they have not worked. My computer runs on Windows 10, I have no antivirus as of yet, and I have already tried unparking.