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.
Surface Pro 5 News - release date, UK price, features, specs
Microsoft Surface Studio hands-on review: the iMac killer is here
Best Mac antivirus 2017
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.