this issue happens usually when you're working on Win Vista/7 with UAC turned on.*** on Win8 you can't just edit the file and save it on it's original location. later replace the original file with the new one you saved on the desktop using the file explorer's Copy-Paste.Can check your email, P2P clients like Utorrent or limewire while you are downloading. Ofcourse you can remedy the what each section of the UI does just by having the mouse cursor hover over it for a second and let the actions of that particular section pop up and inform you what its function is. Plus when the rotating avant 4 icon in your quick launch doesn't control the actuall Avant 4 virus scanner.
One of my favorite features is avast screensaver which scans your hd:s when computer is on screensaver.
Not been disappointed of using it and very please from their support also. F-secure was just terrible (deleted outlooks inbox when it had one virus).
This product has been perfect for my family and saved me a lot of aggravation and money also compare to other solution. Also avast found few trojans that f-secure didnt found.
All annoying sounds and pop ups can be dis and re-enabled. I was pessemistic at first, I doubted any free product could compete with the commercial products but much to my surprise it is fabulous compared to the big M.
Like other reviewers it found trojans the big guy did not.