Maybe reset IE9 and see if that helps.
Have you tried the Avast website to see if it is a possible false positive.
Now I have just run the fix it for this problem probably nothing to do with your problem but you never know.
Fujitsu Lifebook P727 laptop review
Best of the Grad Shows 2017: University of the West of England (UWE)
Best value Mac: Which is the best £1249 Mac to buy
Les meilleures GoPro 2017