Explore your network neighborhood by double clicking on your network neighborhood. You should be able to see the other computers on your network.  If you get a 'network inaccessable' error, wait about 30 seconds and try again.  Sometimes it takes a little while for the network to completely initialize the network browser.

If you are unable to see the other computers, keep one computer turned on and reboot the other. Repeat with the other computer.

Try exploring from both computers again. If this still does not work, right click on your network neighborhood and select “Find Computer”. Type in the name of the other computer.

 

Also read over this article about network browsing.

Remember the link lights on your hub or switch or even your network card? Are they lit? If not, you have a cable problem or your network card drivers are not working.

Read this article to resolve $IPC network login problems between Windows 98/95/ME and Windows 2000.

Double check to make sure you’re your software firewall is disabled if you have one.  By default, most personal firewalls will block any kind of file sharing traffic.

If you have a PCI or ISA network adapter, a resource conflict can cause your network adapter to not function. Check this article for detais.

A standard install of Windows 98 should be updated to service pack 1 to ensure proper networking operation.   Go to THIS site and scroll down to the Recommended Updates area.  Download the 'System Update' and install it on all your Windows 98 computers.