You can also try things like CCleaner (or do msconfig.exe) to check what is launched upon startup - lots of those d@#$ things love to put themselves in startup.
In looking at
Antivirus Action - Virus Solution and Removal for how to remove - it looks like they add in 1-3 items in the startup - (random characters).exe, (random characters)agnz.exe, and/or agnz.exe
Look for those files on your computer while in safe mode, delete them, then remove them from your startup (disable first) and then run malwarebytes again while in safe mode - once it's done running, reboot into normal mode and run both your MWB + AV again.
Reason why I recommended CCleaner is it also will clean out all temp folders where some older viruses like to store things as well.