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I'm certainly no expert, but Quickman7 sent me to the link below (for something else) and it mentions beep.sys as being a renamed clbdriver which is a rootkit.gen malware. Being a backdoor, my guess is you'll need a bit more than just a delete??? Hang around here - you'll get some great advice from those who do know!
well i deleted both clbdriver.sys and beep.sys and it seemed to fix alot of things (notepad will open, windows help will open, antivirus websites aren't blocked, antivirus can update and run, malwarebytes will install and run now)