The log file shows problems with your Avira loading. Try several free scans from here to see if you're infected: http://www.carrona.org/malware.html
The page is fairly old, so some of the scans may no longer be availble. But the point here is to get an independent scan (that's not installed on your system) to tell you if you're infected or not.
I also see Avast errors. If you have more than one antivirus installed, please uninstall all of them. Then install a fresh copy of the one that you want to use (ONLY install one). The same goes for firewalls and Internet Security applications (including the Pro version of MalwareBytes).
Beyond that I don't see any further obvious issues.
If this doesn't fix things, I'd either try a repair install of Windows ( http://www.sevenforums.com/tutorials/3413-repair-install.html )
or I'd backup your stuff, wipe the system and start over fresh.
My browser caused a flood of traffic, sio my IP address was banned. Hope to fix it soon. Will get back to posting as soon as Im able. - John
(my website: http://www.carrona.org/
)**If you need a more detailed explanation, please ask for it. I have the Knack
. ** If I haven't replied in 48 hours, please send me a message. My eye problems have recently increased and I'm having difficult reading posts. (23 Nov 2017)FYI - I am completely blind in the right eye and ~30% blind in the left eye.
<p>If the eye problems get worse suddenly, I may not be able to respond.If that's the case and help is needed, please PM a staff member for assistance.