In my home I have 1 Desktop (XP Home, ethernet connection to internet) and 3 laptops (XP Home, Vista, Win 7, all connect wirelessly). Since I set it up 8 months ago, all have seen each other and been able to access each other's files. Today, I can see all the wireless devices and they can access each other - but the wired device can't be accessed by any of the other laptops.
The desktop computer can access the Win 7 computer via a shortcut I made a while ago - but when I try to drill down to that and the other computers via My Network Places - I can't browse to them.
All have Norton Internet Security 2011 - and the network map function sees all the computers and all are trusted. The desktop does NOT have Windows firewall enabled. I suspect the sudden change in my situation is due to a Windows update I did in the last few days, but I don't know that, and if it is, I'm not sure what changed and how to solve it.
I've un-enabled file sharing on a few folders on the desktop and re-enabled them - that did not help