We're seeing this in our school district, too. We're getting hits on 32-bit and 64-bit Windows 7 Professional.
We're getting false positives on "C:\windows\system32\MBWrp32.dll" mainly. I sent that file off to VirusTotal and got this back:
https://www.virustotal.com/en/file/8f9234b7efd9e06430c79615a3491f59e105622ad439db3042364ebbb0554e43/analysis/We gotten a couple hits on "C:\Program Files\Google\Chrome\Application\39.0.2171.95\libglesv2.dll", too.
It sure looks like a false positive. I threw on a couple of exclusions to try and stem the tide.
Anybody know if there's an API that I can use to connect to the "Virus Chest" on a hundred PCs to restore this file, or am I better off just copying it with a script?
Edit:
It looks like this is going to be a chance to exercise an "Auxiliary Task" to restore previously-detected files from the "Virus Chest" that are no longer detected *once* Avast updates the definitions. >sigh<