Threat detected every 20 seconds

Hi, I have Avast premier and I am getting a threat detected alert every 20 seconds. I open chrome, threat detected. I come to this website, threat detected. I press any link, threat detected. I thought it was chrome, so I opened explorer, threat detected! It’s driving me batty! It just started doing this yesterday. Today I did a complete computer scan, nothing found. I updated Avast, rebooted computer, open chrome, threat detected. What is going on? The alert reads: Avast Web Shield has blocked a harmful webpage or file. Infection: URL MAL. I have no idea how to stop this. Please help!

Please follow the scans in this topic and attach as many of the logs as you can run.
Logs to assist in cleaning malware

Please post the replies in a post / new thread in the Viruses and Worms board here.