0x80340011 NDIS Adapter Not Ready — Real Fixes

1. Power Management Killing the Adapter

This is the culprit in about 70% of the cases I've seen. Windows loves to put network adapters to sleep to save power. Problem is, it doesn't always wake them up properly. You'll see this error after waking from sleep or hibernate, or when you plug in a USB adapter that's been idle.

Fix it:

1. Press Win + X and select Device Manager.
2. Expand Network adapters.
3. Right-click your adapter (look for Realtek, Intel, or Killer) and pick Properties.
4. Go to the Power Management tab.
5. Uncheck "Allow the computer to turn off this device to save power".
6. Click OK, then reboot.

I've seen this fix stick on every version from Windows 7 through 11. Don't bother with the advanced power plan settings — that rarely helps. Just kill the checkbox.

If you have multiple adapters (WiFi + Ethernet), do this for both. Even if only one is failing, the other can cause the same error when switching connections.

2. Hung NDIS Miniport Driver

When the power management fix doesn't work, the NDIS miniport driver is stuck in a bad state. This happens after a driver update or a failed network reset. The adapter shows in Device Manager but won't respond to any commands. You'll get error 0x80340011 when trying to enable it or change its settings.

Fix it — restart the driver from command line:

# Run as Administrator
netcfg -d
netsh int ip reset
netsh winsock reset

This wipes the network configuration and reinstalls all adapters from scratch. Your machine will lose its IP assignments, so have your static IPs written down. Run each command, then reboot.

If that's too nuclear, try this instead:

# Disable then re-enable the adapter
netsh interface set interface "Ethernet" admin=disable
netsh interface set interface "Ethernet" admin=enable

Use the exact name from netsh interface show interface. If that fails, the driver's toast.

3. Corrupt Driver or NDIS Stack

Last resort. When neither power management nor a driver restart fixes it, the NDIS stack itself is corrupted. I've seen this after malware infections, bad VPN installs, or third-party firewall software that hooks into the network stack and doesn't clean up after itself.

Fix it — reinstall the driver properly:

1. Open Device Manager.
2. Right-click the adapter and choose Uninstall device.
3. Check "Delete the driver software for this device". This is critical. Skip it and you're wasting time.
4. Reboot. Windows will reinstall the generic driver.
5. If the generic driver doesn't work, download the latest driver from your motherboard or laptop manufacturer's site. Don't use the one from Windows Update — it's often outdated.

If that still fails, reset the NDIS stack manually:

# Boot into Safe Mode with Networking
# Run as Admin:
netsh int ip reset C:\log.txt
netsh winsock reset catalog
netsh int ipv4 reset
netsh int ipv6 reset

Reboot after each set. If you're still getting the error after this, your adapter hardware is likely dying. Try a USB network adapter as a quick test.

Quick-Reference Summary

One last thing: if you're using a USB WiFi adapter, try a different USB port. I've had three cases where a dying USB controller caused this error. Swap ports before you swap drivers.