Yeah my pc's good to go, actually just built it not too long ago
Not running any mis-matched RAM in there? Also make sure that your CPU and RAM are running at the correct clock speed and not over/under clocked... this can also cause stability issues.
Does your computer do any other weird stuff like freeze, crash randomly, or reboot itself without warning? If not, then it could be "just one of those things".
Hopefully we can figure it out because after seeing your pixel art I want to see some of the games you can come up with