|These two complete the set of why I call "first aid" if you haven't tried them already:|
Junkware Removal Tool (JRT)
(blue Download button near top - not anything else on the page).
Download and "Save" the file somewhere. Go to the saved file then double click it to run JRT. It might appear to have stopped at times or flash the screen but sit tight until it has finished.
(green Download button top right - not anything else on the page)
Install and Run the program but before doing its Scan go to "Settings > Detection and Protection" and put a checkmark in "Scan for rootkits". Quarantine anything it finds.
Please copy/paste the logs on here if they find anything. That will give us an idea if anything else is lurking and what it might be about.
Always pop back and let us know the outcome - thanks