for a while now my PC has been starting to lag because of CPU throttling. Using some software, I can see that my CPU temp is usually sitting at around more than 75 degrees C. This is quite concerning because I can't watch YouTube video's or do an online class without CPU throttling lagging out my PC. The first thing that comes to my mind is that my fan isn't working (I don't even know if I have one anyways - specs). Please note that my computer has been shut off multiple times without warning (due to overheating). Any possible ideas on why this is happening? Can it be that I don't have a fan? Thanks for your help in advance.