PC display after reinstallation WinXP

I expose my PC quickly (humm. ..):
I had to reinstall WinXP on a partition other than the one on which he was previously installed. Obviously this gives me a lot of sweat!
One of the first things was to put the resolution of my screen as before (LCD 19 "ACER) ==> reposition in 12xx/1024 or something. OK. But when I move a window or scrolling, it put a lead to upgrade. Hello taking head! I decided to update the driver for my graphics card (Nvidia GeForce 6600 GT). It happens that I had on my DD the last driver recently installed pb for incompatibility with some games (nickel plant at the time). reinstalls and I continued on the next startup, is that I find myself with a 800x600 screen and 4 colors!
According to the manager device, the graphics card is up to date ... Av you is that do I do? What what device driver is not up to date?
I watched the side screens, but in principle there is no specific driver over outside a Microsoft seems to date ...

Can someone have any idea ...

Thanks

Driver chipset football ...

This is the first thing to install windows after installation!

Simple not?

Tried but it does not work better.
First I did (from the installation CD) before installing the Update Driver of the graphics card and installing it in him that I had the problem. I just try to update the chipset driver (nVidia nForce2) on the internet and it has not arranged my business graphics ...
Another idea?
I might install software that identifies updated drivers or not ... But I'm not sure it helps a lot ..