I had the exact same happen to me for that dll on june 9th. It was blocked immediately when windows started and from what i can make out it's part of the amd catalyst control centre, i presume you have it installed since you're using an ati card? So as the forum was unfortunately down i did as much checking on it as i could and i really think it's a false positive, i then restored it and put it in the exclusion list. I assume it came from the latest catalyst software version 14.4 and that new virus definitions i guess tagged it as suspicious and there is a precedent for that, i remember avast quarantining steam not so long ago.
EDIT: I see the links polonus posted that it is indeed part of the amd suite so that answers that. Really hope it's a false positive though. Also, for some odd reason the same dll appears twice in the virus chest.
I just noticed the dll listed in those two links is version 4.5.4990.33584 but the version i have is 4.5.5220.38440 and i can't seem to find a newer scan of that file on those 2 sites, again i'm presuming because it comes from catalyst 14.4 which was released in april. So i really would like to check that the md5 hash matches if there's a newer scan but there doesn't appear to be that i can find.