Quick Answer

Open an admin Command Prompt and run netsh int ip reset, netsh winsock reset, ipconfig /flushdns, then reboot. If symptoms persist, follow up with netsh interface ipv4 reset and netsh interface ipv6 reset. This sequence rebuilds the Windows TCP/IP stack and fixes most 'no internet' issues caused by corrupted network configurations.

Spotting A Corrupted TCP/IP Stack

Classic signs include: Wi-Fi connecting but pages refusing to load, ping working to your router but failing to evetech.co.za, the network adapter showing 'no internet, secured', or constant 169.254.x.x APIPA addresses appearing in ipconfig. Loadshedding is a common trigger, since abrupt reboots mid-update can corrupt the registry keys that hold your IP, DNS and Winsock entries. Before resetting the stack, rule out the obvious: power-cycle your router, swap the Ethernet cable, and try a second device on the same network.

The Reset Sequence

Click Start, type cmd, right-click Command Prompt and choose Run as administrator. Then run these in order, pressing Enter between each:

  • netsh int ip reset
  • netsh winsock reset
  • netsh interface ipv4 reset
  • netsh interface ipv6 reset
  • ipconfig /flushdns
  • ipconfig /release
  • ipconfig /renew

Reboot Windows after the last command. The reset commands rewrite the TCP/IP registry hive to defaults, which fixes most stack corruption without reinstalling Windows. If your DNS still misbehaves, set Google's 8.8.8.8 and Cloudflare's 1.1.1.1 manually in your adapter's IPv4 properties.

When The Reset Doesn't Fix It

If you still have no network after the reset and reboot, run sfc /scannow and DISM /Online /Cleanup-Image /RestoreHealth to repair Windows system files. Update or reinstall the network adapter driver from the motherboard manufacturer's site, not Windows Update, because vendor drivers are usually fresher. As a last resort, the In-place Upgrade option from a Windows 11 ISO keeps your apps and files but rebuilds the OS, clearing any deep corruption a stack reset can't reach.

Frequently Asked Questions

Will resetting TCP/IP delete my files or apps?

No. The netsh reset commands only rewrite networking-related registry entries. Your documents, games and installed software are untouched. You will need to reconfigure custom static IPs or saved Wi-Fi profiles afterwards.

Why does loadshedding cause TCP/IP corruption?

Unexpected power cuts during a Windows Update, driver install or registry write can leave network keys half-written. A surge protector helps, but a small UPS like a 650VA line-interactive unit at around R1,499 to R1,899 in SA gives you the seconds needed to shut down cleanly.

Do I need third-party tools to reset the network stack?

No. The built-in netsh and ipconfig commands are all you need. Avoid 'one-click registry repair' tools you find online, because most are bundled with adware and can make things worse.

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