Recently I downloaded some freebies from Harlequin in pdf format. These have turned up on my desktop as acsm files which I can't open.
At least I think they're the Harlequin books: I can't find them anywhere else. The "properties" don't help much. I've googled this and become more concerned. I've run a registry fix (CCcleaner) and downloaded ADE, just in case I haven't got it!