Windows – Internet connection under Windows Vista stops working until reboot

connectionfirewallinternetnetworkingwindows-vista

I have a fairly clean Vista Home Premium SP1 install on my desktop. There aren't many applications installed. My Internet connection always seems to stop working after web surfing for a while – sometimes 5 minutes, sometimes half an hour. (It doesn't matter whether I'm in Internet Explorer, Firefox, or Opera.) Nothing restores the connection other than a reboot, which I have been doing at least once a day.

All other machines on my network are Windows XP, and they all work fine even when this Vista Internet connection stops working. Also, file shares to and from the Vista machine work okay even when I can't get out to the Internet.

Things I tried:

• Pinged various websites
• ipconfig /release /renew, etc….
• Rebooted router (Belkin – Yeah, I know it's crappy)
• Rebooted cable modem (TimeWarner)
• Disabled AVG antivirus and ZoneAlarm firewall
• Uninstalled AVG/ZoneAlarm
• Did a spyware scan with several programs – CLEAN!

Also, I should point out that this machine has been working fine for the year or so that I've had it. These problems have started in the past month or so, although I can't remember anything I did that would have caused any issues. My System Restore points somehow got lost, so I can't do a System Restore.

How do I fix this problem?

Also, I tried using OpenDNS and am getting the same results if it makes a difference.

I am fairly knowledgeable with both Windows and networking, but this one's got me scratching my head!

netsh winsock reset