The first time I used uTorrent after installing Avast, I got a popup from Avast to say that it was a suspicious file and was being submitted for an examination scan which would take around 40 seconds so uTorrent didn't open. After a short while the popup said uTorrent was clean and it opened. I didn't get anymore popups on subsequent launches of uTorrent but still got the delay in opening. I couldn't stand the long delay every time it started, so I switched to qBittorrent which opens immediately.