Problems conecting to a WIFI Network

> i have a client commputer with Windows Vista Ultimate installed, and i am
> having problems logging on her wifi network. It doesnt get the IP from the
> router, i tested everything, i configued the network, the security password,
> and i still cant get into the network. She says me that it worked until
> may, 9, and i saw in that date there were some updates installed on the
> computer, but i cant use the restore system, because it doesn do the
> restoring, and i have the computer in the same place where i begin, without
> no changes. Anyone, have any idea of how can i solve this problem. Any
> help would be completely helpfull
> Thank
>
> ramiro Fernandez llano
> Corrientes - Argentina
>