Anybody who has multiple computers connected together has encountered network related problems at some point or the other. It maybe as simple as not having the lan cable firmly attached to more serious problems such as sluggishness or intermittent disconnections. Here is a brief article that attempts to fix one of the most common network problems, that of computers not being able to “see” each other on the same network.
Let’s start our troubleshooting with Windows’ very own network troubleshooting wizard; not because it’s likely to help, but because it’s quick and easy. In XP, select Start, Help and Support. Click Fixing a problem and then Networking Problems. In Vista, select Start, Help and Support. In either version of Windows, click Troubleshooting, followed by Troubleshoot problems finding computers on a home network.
If that operation doesn’t help (and it probably won’t), check your firewall. Third-party PC firewalls like ZoneAlarm and Norton Internet Security often block local networks. As a safety precaution, begin by disconnecting your Internet connection, either by turning off your DSL or cable modem or by unplugging the cable that connects the modem to your router. Then turn off each PC’s firewall.
If the computers still can’t see each other, the culprit isn’t a firewall.
If possible, turn on just one PC’s firewall. Does the problem return? If so, check that PC’s firewall settings and documentation to see how to make it local network-friendly. You may have to add your other PCs to a “Trusted Zone” or some such group.
Repeat this process with each computer. Don’t reconnect to the Internet until all of your firewalls are back up and working.
Here are some more steps to take to troubleshoot other potential trouble spots:
