Ok.. I think you might not configured file sharing properly on those computers... Temporary disable all the firewalls on computers (windows firewall, antivirus firewall, etc) until you have resolved this issue. You should be able to ping that Harlequin's IP from
other computers, then take a look on these artilces to help you...
Yeah, think I've done most of those things on the boys Vista laptop, still can't see other computers. And yeah, the wireless isn't really a router for anything, just to spew out wireless; upstairs computer is just attached to it via network cable because
I didn't want to run another cable up there, I'm probably going to bring the wireless downstairs anyways too hook up to the router(it already is upstairs) so the upstairs computer can use that plus and be into the router directly.
Would the Netgear product not make things cleaner and easier? Since all computers(each has it's own static IP) will be hooked up to it, and have the same parent. Would it not be less of a hassle for them to see each other, for those not 100% network-saavy?