95% cpu usage and fps deops

Hello everyone,

Ive been playing pubg for 2 weeks fine with 130 fps, but then suddenly 2 days ago my fps started dropping to 5-10-20-30 and it’s literally unplayable right now. Cpu temperature doesn’t go above 50C, but cpu usage is constantly above 90% and my pc even restarted automatically few times.

Do you know what could be the problem? Ive got I5-8400 2.80ghz, I know it’s old, but as I said above, I’ve been playing it for weeks fine with 130fps

Thanks for replying