Make a note of the offending miscreant processes /files, etc., and their locations..
Try installing/running Freefixer (in Administrator mode)..(there is a portable version if you'd prefer not to install anything)
Click 'Start Scan' and, when scan is complete, see if you can find offending process/service/registry start-ups/task to schedule for deletion, then click "Fix" at top of Free FIxer Menu....
Once infected, many likely advocate a full 'nuke and pave', i.e., delete partitions, fresh install of OS and apps.
I've included the Freefixer option for your info, so, use it at your peril of hoping it rids you of whatever malware was previously identified by your AV. (I'd recommend a scan with both Hitman Pro and Malwarebytes Antimalware, as well!)
www.freefixer.com