Vista & Wireless

I'm just about tearing my hair out here, so hopefully someone on here can help me with this. I've searched everywhere for an answer but still can't resolve my issue.
I have a new Netgear DG834G Wireless modem/router.
I have a laptop (XP) and Iphones connecting to the network successfully but my PC (Vista) is "connected with limited access". i.e. is picking up the modem but can't open web pages etc.
Anyone got any ideas?
Thanks
I have a new Netgear DG834G Wireless modem/router.
I have a laptop (XP) and Iphones connecting to the network successfully but my PC (Vista) is "connected with limited access". i.e. is picking up the modem but can't open web pages etc.
Anyone got any ideas?
Thanks