As suggested, do a virus scan using your own A/V. Then download this and try again Malwarebytes.org
It is my thought that you do have a virus. If you did not, already get the, above, sage
advice, I would have told you to do a virus scan, too.
If the scan shows nothing, my next step would be to attempt a repair.
Try the easy one first: From an administrators account type cmd in search. When you find cmd
right click, the run as administrator then enter. From cmd type this sfc /scannow. If it finds
some errors try it 2 more times
If that does not work, try this Repair Install