Agreed with the others that you should go with Malwarebytes with your current AV. Also you might want to try Hitman Pro also. It has a free unlimited scan and it's in the cloud. You can activate a 30 days trial if it catches something that slipped by your AV.

I also suggest some sort of back up or rollback feature software. You might want to try the AX64 Time Machine if you like. It's a hybrid of an imaging and roll back software which allows you to go to different states of the PC with just one click just in case something were to happened. You can also back up your HD from it.

AX64 Time Machine for Windows | PC backup, snapshotting, disaster recovery software