Avimg.dll missing

[bengal]

Hi all of you, I am pretty sure there is already a thread helping with this subject, but I have tried, and seems I am unable to do so. I am stuck with the error message on start up saying
C:\Users\Utilisateur\AppData\Roaming\avimg.dll unable to find the file.
I have use ccleaner, malawarebites, and few other things. Seems I have been able to delete the medfos.ca trojan, but now I am left with this message.

I have seen a thread, but been unable to do as they said. Anyone to help with this issue ?
( by the way, french speaking here )
Thanks