The network center on the Acer Aspire One was not working. Apparently as a power outage corrupted the network settings. This helped:
rm -rf ~/.gconf/system/networking
Then restart the PC and the internet stuff will re-initialise. You have to re-do the wifi stuff, password.
Here’s how to print from a Windows XP PC to a printer attached to USB port of an Airport Extreme Base Station or Airport Express