Laptop computer is (extremely) slow, both in function and boot up and shut down . I've been fighting it for a while now. Started with a Firefox update (66.0.3 I think) , ran through the browser update function. Several years old Toshiba Satellite laptop. Won't allow my emsisoft to update. Scan runs but hangs at 80%. Installed malwarebytes and ran it and deleted 2 pups. Ran ccleaner and also the registry cleanup. It also hung but the file it was scanning was a Firefox file. No help. Used file explorer to search "Mozilla" and deleted all files that popped up after Firefox uninstall. I think that