One-Post Wonder

Did you try the fixes on the web pages? Go back to here and scroll down to the "Windows XP SP2 Networking Bug Fix - Download" section and try both fixes there. If that doesn't work, next time the internet freezes try going into the MS-DOS prompt and typing ipconfig /release and then ipconfig /renew If that last thing works, I'll be amused.

You have NIS and SP2? Is Windows Firewall off? It causes conflicts with every software firewall ever, pretty much. (Control Panel -> Security Center -> Windows Firewall) I did a bit of research. Apparently, SP2 is notorious for causing networking problems. Here are a couple useful articles with fixes you might want to try. Windows XP SP2 Networking Problems Help How to Troubleshoot and Fix Windows XP SP2 If you're positive this problem is new since SP2, try the registry fix and Microsoft patch. If those don't help, your best bet might be to roll back to the pre-SP2 state. How're you connected? Is this a one-computer deal, office network, or what?

I'd been having a similar problem...the web browser would stop working after 15-20 minutes of internet activity. It took me about 2 minutes to fix following a fairly simple procedure. The problem for me was that the DNS cache overflowed after a little while, so I simply added registry keys to prevent caching. This can be done as follows: 1. First thing you need to do is clear your current cache. At the command prompt (Run -> command) type in ipconfig /flushdns If everything went well ipconfig should spit out a line about successfully flushing the cache. 2. Now get into the registry editor (Run -> regedit). Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Dnscache\Parameters 3. Right click in the space to the right and select New -> DWORD Value. Name the DWORD MaxCacheTtl and make sure its value is 0. Values can be changed simply by double-clicking on the DWORD. 4. Create another new DWORD. Name this one MaxNegativeCacheTtl and again make sure its value is 0. 5.Close regedit and restart. This solved all the problems for me. Hope it works as well for you.