I’m sorry I’ve forgotten to mention AdwCleaner, as I tried several things found on the solutions I read on internet ; here is his first log. I also tried TDSSKiller, I also attach its first log.

I applied your fix with OTL, and since the PC has rebooted, it seems that the problem has disapeared ! Its log in attachment. Many thanks for your help and your efficiency ! :smiley:

Do you think I can definitely remove the files moved by OTL ?