It isn't clear that your Vista system is connected to the network at all.
The first thing to do is establish you can talk Vista <-> router.
in a cmd window type ipconfig/all the router address is the on for Default Gateway (my router is 192.168.1.1) in a cmd window type ping 192.168.1.1 (replace with your router address)
You should get Reply from 192.168.1.1: bytes=32 time=2ms TTL=64 Reply from 192.168.1.1: bytes=32 time=1ms TTL=64
So yes we have a connection to the router. If this doesn't work, check you have the correct WEP key on the Vista box, or suspect firewall on Vista
Now try something on the internet -- mudcat.org is good, but lets try with the IP address first
ping 71.162.244.125
You should get Reply from 71.162.244.125: bytes=32 time=109ms TTL=113 Reply from 71.162.244.125: bytes=32 time=101ms TTL=113 Reply from 71.162.244.125: bytes=32 time=101ms TTL=113 Reply from 71.162.244.125: bytes=32 time=103ms TTL=113
Lets add DNS lookup in and see if it works
ping www.mudcat.org
Pinging www.mudcat.org [71.162.244.125] with 32 bytes of data:
Reply from 71.162.244.125: bytes=32 time=104ms TTL=113 Reply from 71.162.244.125: bytes=32 time=102ms TTL=113 Reply from 71.162.244.125: bytes=32 time=103ms TTL=113 Reply from 71.162.244.125: bytes=32 time=105ms TTL=113
If this doesn't work then there is a problem with DNS access
If this all work we have access to the internet. Does it work in the browser?
In your browser try typing 71.162.244.125 You should get a page with just Hi. Something went wrong if your reading this. Good luck.
If you don't there maybe a firewall allowing ICMP (ping uses) but not TCP that http uses.