Facebook not able to start

A friend contacted me re an error coming up when he tried to access Facebook. Basically a message saying

“It looks like you downloaded software that is affecting your facbook account and showing you unauthorised ads”

It then offered to run a McAfee Scanning tool  – which sat at zero percent.

Firstly we ran AVG and vaulted two items but still unable to access. We downloaded the app it directly and ran – with limit success in  that it claimed to have run and found nothing. We reran it with AVG temporarily off and were rewarded with it finding an executable called au_.exe in the windows temp folder in a sub directory.


Once removed Facebook access was restored.