Hi. I've just switched over to wireless so two desktops can be connected to the net in different rooms simultaneously. On my new HP desktop with Vista, Wireless works fine, but I just plug it directly into the router for connection.

On my older XP run Packard Bell Ixtreme Desktop, upon attempting to connect, I am faced with

"No wireless networks were found in range

Make sure the wireless switch on your computer is on."

I wasn't aware that my computer had such a switch...Is it physical?

My Wireless router, adapter and connection/network are fine.

Googling yielded no results.

Help me Obi-Wan Kenobi...You're my only hope...