Sims Unplayable, Random Crashes, Completely Freezes PC

Hi there, I've been having this issue for about a month now. Sims is completely unplayable for me...I'm having constant random crashes that don't seem to have any rhyme or reason as to when they occur. About 80% of the time it completely locks my computer up and I have to turn off my PC from the switch on the back. Sims 4 is the only game I have any issues with. Repairing game files made the problem worse and more frequent and I do not play with mods or CC at all.

Any help would be appreciated.