So a couple days ago, out of absolutely nowhere my computer started lagging. Now this isnt happening when im playing a game or anything of that sort. Right after boot i noticed it was slow when opening google, and just everything. Id like to mention that sometimes the screen goes black for like 10-30 seconds. My back cooler case fan had also died around the same time, though i doubt it has anything to do with it. Im thinking maybe thermal paste? Its been 2 years since i last reapplied it but who knows.