Windows 7: Windows 7 Blue stripes screen

Hi,
I was just trying to install Win7x86 on clean partition. My installer did NOT give me any errors or whatsoever... but after i installed it and im trying to launch it, all i can see is my screen covered in blue stripes.
Important: I had that problem on Vista, however i fixed it by changing frequencies on my graphic card (GeForce 7900GS) on 'core bus' from 540Mhz just a little bit down and memory bus(also down).
What should I do? Is there any way to do that? It also gives me that screen when I'm booting in low resolution mode.(My WinXp is working on normal frequencies).
PLEASE HELP!
My specs:
AMD Athlon 64 X2 Dual 4200+
1GB RAM
GeForce 7900GS

did you update the card drivers? try reinstalling just to be sure?

the 7900gs and 7900gtx have always been prone to failure through heat due to the poor quality solder that was used, has yours been running at too high a temperature ?

Look in your BIOS for settings for your graphics card. Perhaps you can mess with the clock settings a bit and see if it helps.

Be aware, however, that there is a certain risk involved. Be careful, or you could fry your card.

With the problems you describe, it is most often the video card is failing. I would suggest testing another card to see if the problem persists.

offi55 ,it would help if you only made one thread on this subject , then you would have all the answers in one place

i wasn't tuning it, i was just a regular gaming user if it works on XP it should also on Windows 7, right?
Installing drivers in XP wont fix the problem in Windows 7, right?

try installing the drivers for vista in compatibility mode ,have you downloaded the latest drivers from nvidia?

where should i install them? i have WinXP on that comp. I cant install any drivers in Windows 7 cause i cant run it...

can you run Windows 7 in safe mode?