If Avast requests a boot scan then allow it to do so
Lets have a fresh look at your system now

Download OTL to your Desktop
Secondary link
- Double click on the icon to run it. Make sure all other windows are closed and to let it run uninterrupted.
- Select All Users
- Select LOP and Purity
- Under the Custom Scan box paste this in
netsvcs
BASESERVICES
%SYSTEMDRIVE%\*.exe
c:\program files (x86)\Google\Desktop
c:\program files\Google\Desktop
dir "%systemdrive%\*" /S /A:L /C
/md5start
rpcss.dll
/md5stop
CREATERESTOREPOINT - Click the Run Scan button. Do not change any settings unless otherwise told to do so. The scan wont take long.
- When the scan completes, it will open two notepad windows. OTL.Txt and Extras.Txt. These are saved in the same location as OTL.
- Attach both logs