I've moved this to it's own thread. That old freezing thread is too long and so it is only open for possible solutions. New problems get a new thread.
It may be a virus.
Suggest, on another computer, download RKILL (several versions) and Malwarebytes to a USB thumb drive. Then reboot to safe mode and run RKill (try two or three of the RKill versions) to see if it finds anything malicious in memory. Then without rebooting, install Malwarebytes (but do NOT activate the free trial if you already use a different antivirus product). Then run a complete virusscan with malwarebytes.
Links to RKill & Malwarebytes can be found in our
Freeware DB (RKILL is near the bottom under section "Virus Removal")