Hello. Sorry... I don't speak French.... (well, I understood your message because I used online-translator ha ha..)
But I have the same problem as you, but my computer is an Acer Travelmate 5720G-602G25Mi. It has got an ATI Radeon mobile X2500... And I am overwhelmed because this problem.
When I use the Windows Vista in mode "aero", I can´t work too much time without obtaining this message. It´s very very strange, and I think it´s a driver problem (Vista + ATI).
Disconnecting modo Aero can help (the message doesn´t appear since I did it...) only one time, but at that moment I was doing a lot of things at the same time, and it could overload the system....
BUT WE ARE NOT THE ONLY ONE... I could see many descriptions of the same problem in forums of Germany and Italy (and I am from Spain), in acer travelmate 5720 and others models and manufacturers ... The problem presents everytime in windows vista and ATI radeon mobile (X2300.... X2500...) so I think it´s tied to this graphics-hardware working in a Vista sytem WITH the "aero" visualization activated....
But if you read this advertisement of ATI....
http://support.ati.com/ics/support/default.asp?deptID=894&task=knowledge&questionID=27116
....ajamm... there are others cards......it´s surprising, isn´t it?
and it isn´t the worse thing... ATI DOES NOT TAKE RESPONSIBILITY OF THE NOTEBOOKS GRAPHICS DRIVERS!!! you can read it here:
http://support.ati.com/ics/support/default.asp?deptID=894&task=knowledge&questionID=26978
So... if ATI doesn´t make the fine driver ... ASUS, or ACER... MUST MAKE THE DRIVER.... I suppose
Well, at last, the problem seems to be recent (only in notebooks released in August and September of 2007) so I HOPE THAT Acer (or Asus, or BILL GATES -I DREAM WITH YOU DUDEEEE- GRRRR) makes something PROMPT with this BIG BIG shit...
And it isn´t all. This is the second notebook I have got (the first was returned to the shop because we thought that it was broken -it has the same awesome problem-...) and you can see... I was in an error