Personally I feel adaware is a bit of a lightweight (rarely found anything on my system but I didn't expect it to) by comparison so I would suggest also trying SuperAntiSpyware which I feel is a little better than AVG-AS, which doesn't seem to have advanced much since it was Ewido and bought by Grisoft.
You don't have to continue scanning till you find something there might be nothing there, it is a precautionary measure, confirmation that you are clean, rather than hoping to find something.