But you didn’t say what the file name or location of this was, it is often hard to keep calm when the dark brown stuff hits the fan after a detection and you should always analyse what is set in front of you.

You could also check the offending/suspect file at: VirusTotal - Multi engine on-line virus scanner I feel virustotal is the better option as it uses the windows version of avast (more packers supported) and there are currently 30 different scanners.

Or Jotti - Multi engine on-line virus scanner if any other scanners here detect them it is less likely to be a false positive. Whichever scanner you use, you can’t do this with the file in the chest, you will need to move it out.

Because if this download.small.bgv was serious, not only did adaware miss it so did avast, the multi-engine scanners above confirm or deny detections. If it is a god detection you need to send a sample to avast for it to analyse and update the VPS signatures.