big problem, plz help

Well yesterday i made some big refreshing on my PC.
Deleted drivers, installed the newest ones, direct x
update, windows update, anything what u can imagine.

The video card update was a mistake. Everything worked
fine before and now its causing bluescreen / blackscreen.

I have a shitty PC and since everything worked fine, I dont
feel it important to mention everything but my video card is
a ATI RADEON HD 2400 PRO PCI and I'm using WINDOWS XP.

On the bluescreen the error message is:

Bluescreen caused by ATI2DVAG, so it must be with the driver.
I read a lot of topic about the same problems but solution didnt
work.

Please help me, usually i fix everything myself in 2 mins with google
or other knowledge, but now I doubt i can do it.

Any working solution will be awarded with a smile. Unfortunately
its all I can give now.

P.S.: ahh problem is not coming up when i m playing, its more likely
came up when i alt-tab game and tried to browse in IE. and now
even if i dont play just open some page, its still crashes with IE.

Did not notice it with Firefox, I m writing in it now but dont come
up with "use firefox", my PC is dying and i want some working solution