shutdown immediately

Hey everyone, Pardon if this is the wrong place to put this but here it goes! I'm experiencing a weird and persistent issue with my desktop PC, it randomly shuts off as if someone pulled the plug, just instantly powers off. After that, I am unable to restart until I power cycle the PSU. Then it...

See title. This particular issue stems from GTA5, with every other game I've played save RDR2/RDO not having issues. Whenever the map zooms in and out in loading screens too quickly, or on cayo perico after a few minutes, the monitors instantly cut and the CPU error light on my mobo comes on...

I apologies for my English. I'm not sure if this is the correct section, sorry if not. The PC was working fine until a few months ago. I go on to explain the problem. PC Specifications: All the components except the HDD (5 years old) are only 2 or a year and a half years old. Issue: The...