Problem solved, I replaced the 8.7 ogl dll by the 8.6 one, and it seems to work. Thanks.

Ok so I found it, here is the event log : http://shipon.free.fr/defcon.evtx Looking at it, I read "module défaillant atioglxx.dll" (which means failing module), so my guess would be that it's the OpenGL component of the driver that is not working, knowing that I have the very last drivers ...

No, here is my defcon directory if you want to check (Steam one) :

http://shipon.free.fr/defcon.jpg

Hi, I've read a bit of this forum trying to find a solution, but it seems that each case is different, so here is mine. I've bought Defcon via Steam, and when trying to launch it, after 3 seconds of black screen, it tells "Defcon cesead working, Windows is trying to find a solution", and o...