more help

First you need to put ComboFix where we instruct you to put it which is directly on your desktop, not here:
c:\users\Jeanette\Documents\Downloads\ComboFix.exe

It looks like you uninstalled Avira as it is no longer in your add/remove program list. Avira had some bad updates recently and they had to fix that issue with a new update. So you may have been getting a false positive.

We can remove a few items from your temp folder.

download The Avenger by Swandog469, and save it to your Desktop.

* Extract+ avenger.exe from the Zip file and save it to your desktop
* Run avenger.exe by double-clicking on it.
* -Do not change any check box options!!
* Copy everything in the Quote box below, and paste it into the Input script here: part of the window:

* Now click the Execute button.
* Click Yes to the prompt to confirm you want to execute.
* Click Yes to the Reboot now? question that will appear when Avenger finishes running.
* Your PC should reboot, if not, reboot it yourself.
* A log file from Avenger will be produced at C:\avenger.txt and it will popup for you to view when you login after reboot.

Now run the C:\MGtools\GetLogs.bat file by double clicking on it (Note: if using Vista, don't double click, use right click and select Run As Administrator).

Then attach the below logs:

* C:\Avenger.txt
* C:\MGlogs.zip

 

Why were you trying to re-install MGTools.exe? What pop up? Read what? What user control? If you mean UAC, MGTools will turn it off for you.

You need to be more specific, please.