Question : wireless networking problem "limited of no connectivity"

I have two computers running Windows XP with SP2. Both computers are virus trojon parasite etc. free. Both computers have wireless cards and connect through a Linksys WAG54G modem/router which has the latest firmware.

One computer connects effortlessly to the wireless network

The other computer detects the network and connects (signal strength excellent) but the status allways reads
"limited or no connectivity".

ipconfig /renew takes ages (upto 60 seconds) and shows the following:
"an error occurred while renewing interfact Wirelss Network connection : unable to contact your DHCP server. Request timed out"

how can i sort this out? Answers in non technical plain English please (!)

Thanks

Answer : wireless networking problem "limited of no connectivity"

A clean install will often be the easiest way to get things working again. Just make sure that when you install the wireless adaptor you follow the installation manual exactly. I'd also run SP2 first thing after OS and AV software installation, then run the rest of the windows updates, and then install the wireless...