You're working on a Windows 10 or 11 machine, and suddenly the network drops. Or maybe you just installed a new network card and now you can't connect. When you check Device Manager or run a network diagnostics tool, you see the error: ERROR_NDIS_UNSUPPORTED_REVISION (0x8034002C). It says the revision number in the structure isn't supported. I've seen this a lot—had a client last month whose whole print queue died because this error killed their network connection to the printer server.
What Actually Causes This Error
Your network adapter driver talks to Windows using something called NDIS (Network Driver Interface Specification). Think of it like a handshake: the driver gives Windows a structure with a version number. Windows checks if it supports that version. If the driver sends a version that's too new or too old for your Windows build, you get this error. The fix is simple: either update the driver to match your Windows version, or reinstall it so Windows uses a compatible one.
Fix: Update or Reinstall Your Network Driver
Don't waste time with other stuff first. Go straight to the driver. Here's what works 9 times out of 10.
Step 1: Check Which Network Adapter Is Causing It
- Press Win + X, then select Device Manager.
- Expand Network adapters. Look for any adapter with a yellow exclamation mark.
- If none have a yellow mark, check your main Wi-Fi or Ethernet adapter. Right-click it and select Properties.
- Go to the Events tab. Look for an entry that mentions the error code 0x8034002C. That's your culprit.
Step 2: Update the Driver
- Right-click the adapter, choose Update driver.
- Select Search automatically for drivers. Let Windows find a compatible version.
- If it says you already have the best driver, don't trust it. Go to your PC or network card manufacturer's website, download the latest driver for your exact Windows version (32-bit or 64-bit), and install it manually.
Step 3: Reinstall the Driver (If Update Failed)
- Right-click the adapter, choose Uninstall device. Check Delete the driver software for this device if it shows.
- Restart your PC. Windows will automatically reinstall a default driver.
- If that doesn't happen, go to Action menu in Device Manager and click Scan for hardware changes.
Step 4: Run the Network Troubleshooter (Quick Check)
- Open Settings (Win + I), go to Update & Security (or System > Troubleshoot in Windows 11).
- Select Additional troubleshooters > Network Adapter > Run the troubleshooter.
- Follow the prompts. It might reset your network stack.
Step 5: Check Windows Updates
Sometimes a Windows update changes the NDIS version. If you're on an old build, newer drivers don't work. Go to Settings > Update & Security > Windows Update and install all pending updates. Restart after.
If It Still Fails
Try these two things:
- Disable IPv6: Right-click your network icon in the taskbar, go to Network & Internet settings > Advanced network settings > More network adapter options. Right-click your adapter, select Properties, uncheck Internet Protocol Version 6 (TCP/IPv6), click OK. This forces the driver to use IPv4 only, which often fixes version mismatch issues.
- Roll back the driver: If the error started after a driver update, go back to the old one. In Device Manager, adapter Properties, Driver tab, click Roll Back Driver.
If nothing works, try a different network adapter if you have one. I've seen cheap USB Wi-Fi adapters ship with buggy drivers that always throw this error. Swap it out and you're good.