Many virus programs will shut down your AV. It might be a good idea to reboot to safe mode and while there run a complete scan with a different AV, like malwarebytes, to see if it finds anything. You can find links to
Malwarebytes in our
Freeware DB
NOTE: if you try malwarebytes say NO when it asks if you want to try the full version. If you allow it to run the trial version then it may conflict with your existing AV; what you want is to just use the Malwarebytes in passive mode (ie only when you tell it to run manually, not actively in memory like the trial and full versions run)