First, it would be helpful if you told us the operating systems of all the computers, especially the problem machine..
Second, if any of the computers on the network are Vista computers, then please install LLTD on ALL Windows XP computers that reside on the network.. It helps the Vista machines find the XPs:
Next, check the steps in the link below and follow them.
Hope this helps and let us know how it goes.
A few months ago I set up my home network between my 3 computers. Two desktops (hardwired thru hub) and laptop (wireless). Everything worked fine & Iwas able to transfer files between the three. Now something has happened and my main computer (with printer connection) isn't on the home network and I can't seem to figure out how to get it reconnected. The other 2 computers are still networked with each other and work fine. I've gone thru the steps of setting up a home computer, over & over and it finishes each time and tells me to reboot. After rebooting still not connected to my home network. I am naming the computer differently from the others and am able to connect to the internet with no problems on this main computer and the others. I've tried unistalling the Network Adaptor, but that didn't help. I turned of Zone Alarm & no help. If anybody has any idea(s)/suggestion(s) of what else I can try, I'd sure appreciate hearing them. Thanks.