“Boot your machine in Safe Mode. Run MalwareBytes, full scan. You may need to right click and run this as administrator. Should take care of it.”
I used to work for Norton and Cyberdefender in a past life. One thing I witnessed was a TLD4 rootkit knockout Malwarebytes (PRO version), the customer’s AVG paid version (he insisted AVG was better), and locked the system for no system restore. Amazing piece of work who made it..but there was a solution without throwing the laptop out the window.
There is a very, very nasty thing out there now. File name VKNT.EXE Heur. Agent/ Gen-Whitebox. Apparently origin in Vietnam. My Super Anti-Spyware picked it up the other day. Trashed it before any damage to PC. I hope...