Avast may currently be reporting a false positive from heuristics, flagging ILS.DLL as a possible rootkit.

I've just gone through checks over phone on a friend's system, ILS.DLL reports correct size (81920 bytes) & passes Spybot Search & Destroy scan.

A topic on the Avast forums with others getting the same suspected FP (http://forum.avast.com/index.php?topic=40976.0) seems to be getting heavy traffic & may not always be accessible.