Admin Forum:Urgent - PLEASE - extreme spammer of awful images - how to disable ANYONE posting or joining or making new pages

Hello. As the title says, the wiki i made is being attacked by an extremely vicious spammer. I have left a message on special contact but im struggling to find out how to set the settings so that no one else can join; no one can add a page; no one can affect the wiki in any way, shape or form.

This situation is dire, folks; please help as soon as possible.

The alternative is to take the wiki down - which is what he's aiming at. he has attacked our NWN2 server and our forums and now the wiki. But I cannot allow these images to be posted.

Update: in fact im going to have to ask to take the wiki down if this continues. these images are on the front page and Protect, using the edit button, doesnt seem to work on pics. maybe its my noobness. But this is just not endurable.
 * Report the issue here.TK-999 (talk) 16:08, August 5, 2012 (UTC)


 * Taken care of. 16:33, August 5, 2012 (UTC)


 * Thank you very much indeed. Is there a way to stop anyone new registering or anyone at all making any changes except me / anyone I make admin?


 * again thank you. We're under regular attack and frankly, while the DB server owners are doing the best they can and remaining calm, i personally am not able to handle these images or the malice behind the attacks any more.  If the wiki can be just sort of frozen, that will be much appreciated.