Ran to get more beer. :) without knowing any other details - how old is the rig what hardware etc I will speculate it’s full of malware and this can be as simple as spyware not necessarily harming your machine but just spying on your habits And thus often ignored by windows basic security do you have a decent AV software ? A good free one is AVAST - and be careful they are tricky they want you to get the paid Version you want FREE AVAST do not do the trials or other bs just basic av. Let that have a crack at your disk see what it finds.