Boot the PC into safemode with networking
Please download GMER from here
Temporarily disable any real-time active protection so your security programs will not conflict with gmer's driver.
GMER will open to the Rootkit/Malware tab and perform an automatic Full Scan when first run. (do not use the computer while the scan is in progress)
If you receive a WARNING!!! about rootkit activity and are asked to fully scan your system...click NO.
Now click the Scan button. If you see a rootkit warning window, click OK.
When the scan is finished, click the Save... button to save the scan results to your Desktop. Save the file as gmer.log.
Click the Copy button and paste the results into your next reply.
Launch it, allow it to download latest Avast! virus definitions(in your case ignore it)
Click the "Scan" button to start scan.After scan finishes,click on Save log
Post the log results here