So I've build my own PC like 5 months ago all working perfectly until today. Out of nowhere my PC starts freezing suddenly. I can still move my mouse but the screen is frozen. When I play LoL it happens very often the screen freezes for 3 seconds I can move my mouse and after about 3 seconds its back to normal. When it's not freezing its all running very smoothly. My GPU keeps at 38 degrees.
Now I notice the freezing screen also happens sometimes when I am just surfing the web. Again the same problem 3 sec freeze but can still move my mouse.
SSD Samsung 250 GB
8GB Ram 1600
scythe mugen 4 pcgh edition cooler
What I already tried is reinstalling the nvidia driver, I even formatted my PC. None of it helped. Even while writing this topic I got one 3 sec freeze.
What could be the problem?