u/Kunaixq

Was playing GMOD and just kind of posing models and I got a report from my opera browser that it had crashed, everything on my computer freaked out and it flashed black, out of panic I turned the computer off, and when I turned it back on everything became normal, no bad readings from task manager and nothing odd occuring, the only problem I noticed is that my steam now has games in dynamic categories that I didnt add them in, for example being i have a fighting games category and several non fighting games were inside of it, did my computer just freak out for no reason and maybe button presses I was doing caused that? Or do I have something malware related?