Run CHKDSK - to check the drive for errors.
Download AdwCleaner to your desktop.
NOTE: If using Internet Explorer and you get an alert...
In addition to the advice above.
Malwarebytes is not an anti-virus program [not yet anyway]
Turn on Windows Defender.
While waiting for TechSupportPenguin to return - post the following.
TSG System Information Utility - found here....
Separate names with a comma.