Windows 7 can't find my router

After installing windows 7, ( upgrading from Vista ), The first problem that approaches me is that windows 7 wont locate my router which is in the other room connected to a PC with XP on it. This is quite annoying does anybody know how to fix this yet? I know 7 just came out yesterday.

not enough info..................

If it sees nothing, look at the router from the other computer and make sure

1. it is transmitting SSID
2. It isn't blocking ur MAC address
3. ur entering the right pass code.

better still - just disable all security until u can get connected. at least that eliminates router issues.

then u can focus on the NIC driver on the wireless system.