Ran a full scan on one of our machines and had 3 files from Drake (professional tax preparer software) pop as infected.
Checked out Drake's site and while they mention that some false positives are possible due to e-filing support, they don't get into specifics. I can call their support tomorrow (too late today) but one of the first bullet points was pretty much 'we don't recommend/work with free AV' (we're on the business free since this is an approx 10 person company). Google wasn't much help either. So I'm hoping perhaps someone has insight here.
Oh, and MalwareBytes ran concurrently came back clean.
Files:
Drake06\FID\FID042.DLL
Drake06\CRP\CRP115.DLL
Drake10\FID\FID035.DLL
These are all application extensions that are among tons of others in their respective files and years. Numbering fits, file name fits, etc.