Thanks
What is strange is that the site completely blocked my computer with only solution to turn it off by plug.
Even if at reboot (in normal mode), there does not seem to be any damage, nothing blocked, no disinfection procedure like in your 2nd link, …, it annoys me a little that avast (web shield with https scan too) did not react in real time.
It was not only a single picture to afraid , my computer was temporaly blocked
a semi fake alert ?
I do not know if it is related or if I am paranoid but I received on my courier yesterday a notice of “Undelivered Mail Returned to Sender” with my mail but I’d never sent it and I don’t know the receiver.
It looks like piracy even if I have not received other undelivered mails since.
Moreover, I (or another person) never opened doubtful mails and the only way this mailbox could be corrupted (dixit pwned) is avast in May 2014 
