Avast anti rootkit is about 5 years old and has not been updated
Could you run AswMBR as that is up to date
Download aswMBR.exe ( 4.5mb ) to your desktop.
Double click the aswMBR.exe to run it Click the “Scan” button to start scan
https://dl.dropboxusercontent.com/u/73555776/AswMBR%20scan.JPG
On completion of the scan click save log, save it to your desktop and post in your next reply