You're likely good. Sounds like another case of more ScareWare.
MalwareBytes Pro should pretty much take care of it for you. Make sure that it is auto updating the signatures properly.
IF you are still concerned that there may be a problem present you can always reboot into safe mode and run a full system scan with MalwareBytes in Safe Mode, it's not a bad idea as sort of an extra measure as in safe mode there are less things running and contesting for CPU, Memory and IO resources.
Finally you can always use an offline scanner. This is one that seems to work reasonably well
What is Windows Defender Offline?
Regards
Randy