@WillFred,

This is for WillFred ONLY, and for this time ONLY. For anyone else (and for anyone reading this in the future), please do NOT follow the instructions, as the differences between each cases are meaningful enough.

So, WillFred, please download http://files.avast.com/iavs5x/setup_ais.exe. Once you have it in your system, close any other programs, right click on the downloaded file and “run as administrator”. Once the installation finishes, please reboot.

If you have or HAD any other security tool, this step may not be enough. After the reboot, please test and report back.