Well, sooner or later we all come here to ask for help.
In a business computer of a friend of mine, he has AVG (paid) and got an infection that I could not solve.
I've run MBAM (detect at first, clean, but then it comes back). Some scannings with MBAM return clean.
I've run ESET online. The same, first clean, then clean scannings.
I could not manage to run Norton on demand scanning.
Comodo Cleaning Essentials does not pick it up.
The symptom is an add popup at the end of each webpage.
I've attaching some logs.
Side note, C:\WINDOWS\system32\drivers\gbpkm.sys is a banking plugin. It's clean.