Can no longer access networked computer, possible WGA problem?

[Guest]

I have a desktop machine hooked up directly to my router, and a laptop using
wireless. This has been together for over 4 years, and most recent change was
1 year ago I moved, but same network setup. But now, the desktop is
inaccessible on the network. I can find, access and use files on the wireless
laptop. But cannot access desktop from laptop. Get errors that network path
not found. I tried removing and reinstalling ethernet adapter, microsoft file
sharing, microsoft net client, already had netbios. I even tried using
wireless card on my desktop. No dice, can access the laptop, but it cannot
access desktop. It was working 2 days ago, only new change was installing of
the windows genuine advantage notification. Both are valid installs. What is
the deal?

 

[oferns]

Firewalls......turn 'em off then see what happens..

 

[Guest]

Now even if firewalls were the problem, why would it be an issue now a year
later? Firewalls are not on, I am sorry I did not clarify that, but I looked
at that too.