As an IT manager, the first thing I do is download and install the
Malwarebytes free version. Restart your computer in safe mode and run a full scan.
Some malware will shut down Malwarebytes and other protection. If Malwarebytes keeps crashing when you do a scan
download and run rkill. That will shut down the malware processes so they can be removed.
This doesn't always work but it's a great way to start. The premium version of Malwarebytes is pro-active blocking threats and is well worth the cost of the subscription.