Acer Aspire 7520g WIN 7 GPU PROBLEM

Hello !!!


I've got some serious driver problem with my Acer Aspire 7520g.

I've installed a fresh copy of WIN 7 Ultimate on this laptop and all i've got is that the comp runs normaly without Nvidia WIN 7 drivers, as soon i install them the laptop won't boot in windows ...

It freezes on the welcome screen ...

The GPU is Nvidia 8400M ...

The funniest thing is, that i've installed a fresh copy of WIN XP SP3 (just to see if there is a GPU failure) and the GPU works superb on Nvidia Driver taken from the Nvidia support site!!!!


What can i do ... if i don't install driver in WIN 7 it says i've got a Standard VGA card ...


Any suggestions ???

Regards

EE