Graphic or driver problems

UNfortunelty I can't. Most of my friends/family use laptop or old PC (AGP video card)

ok, before you go out and spend money on a new card, let's make sure that windows is not the problem.

either reinstall windows, or, if you have enough space on your hard-drive, you could make a new partition and quickly install another copy of windows 7, so you'll have a dual-boot setup.

try booting into the new windows to see if you have the same problem.

I did an update (when I put win7rc dvd, I had that option) and it didn't change anything.

Anyway, I don't think it's windows7 fault since I'm having those bugs as soon as I turn on my computer so I guess even before the OS is loaded.

i didn't realise you were having the problems before windows is loaded.

in that case - get a new graphics card! (although there is a small possibility that your power supply may be faulty and is not supplying enough to the card - a very small 'maybe'.)

bonne chance!

So I took a few photo with my camera.

here's the blue lines while i'm on windows7 :
http://dl.2ways.fr/pics/1/1/1251815869_bug.JPG (you have to rotate it of 90°)

this is a screen where the first graphic bug appears (almost as soon as I turn the computer on)
http://dl.2ways.fr/pics/1/1/1251815890_bug.JPG

Those are 2 pics when I'm loading windows after a restart :
http://dl.2ways.fr/pics/1/1/1251815902_bug.JPG
http://dl.2ways.fr/pics/1/1/1251815911_bug.JPG


As for the PSU, it's a Seasonic S12-600 (600W, i've just check) .
I've never touch or edit my BIOS so It can't come from there , right ?
And I did an upgrade.
Moreover, now that my videocard was disable by windows, my computer is stable and do not crash. When my videocard was still enable, I had a few crash, a few graphic bugs and blue screens of death.

edit : updated the info about the PSU.

ok, it's definitely not windows!

looks like graphic card. unplug the card's power, take it right out, and put it back in again, plug power back in.

restart machine, if the problem is still there, think about buying a new card.

Problem is still there. Guess i'll have to buy a new Video card.
I might go for ATI now since I had a problem with nvidia.

the ati 48xx series is highly recommended if you play games.