STATUS_NDIS_INVALID_LENGTH (0xC0230014) fix: Buffer length mismatch

What's happening with this error

STATUS_NDIS_INVALID_LENGTH (0xC0230014) pops up when Windows Network Driver Interface Specification (NDIS) gets a buffer that's too short or too long for what the driver expects. The real trigger is almost always a misbehaving network adapter driver — either your physical NIC (Realtek, Intel, Killer) or a virtual adapter from a VPN like NordVPN, ExpressVPN, or even a gaming driver like Razer Cortex.

I've seen this most often after a Windows update (like 22H2 or 23H2) that replaced your NIC driver with a generic Microsoft one. The generic driver doesn't handle buffer sizes correctly for your specific hardware. The fix is straightforward: get the right driver back.

Cause 1: Corrupted or mismatched NIC driver

This is the #1 reason. Windows Update sometimes pushes a driver that doesn't match your NIC firmware. You'll notice the error in Event Viewer under System logs, source "ndis" with error code 0xC0230014, often during heavy network traffic (torrents, large file transfers, or online gaming).

Step-by-step fix

1. Open Device Manager (right-click Start → Device Manager).
2. Expand Network adapters. Look for your physical NIC — e.g., "Realtek PCIe GbE Family Controller" or "Intel(R) Ethernet Connection I219-V".
3. Right-click it → Uninstall device. Check the box that says "Delete the driver software for this device". This removes the bad driver completely.
4. Restart your PC. Windows will reinstall a generic driver, but that's temporary.
5. Go to your motherboard or laptop manufacturer's website (e.g., Dell, HP, ASUS, Gigabyte). Download the EXACT NIC driver for your model and OS version. Don't use the "auto-detect" tool — manual download is safer.
6. Install that driver. Restart again if prompted.

Why step 3 works: The "Delete the driver software" flag forces Windows to not reuse the same corrupted files. Without it, a simple reinstall often brings back the same bad version.

If you're on a laptop with Killer Networking adapters, uninstall the Killer Control Center software too — that suite often injects its own NDIS filter drivers that cause this buffer length issue. Real fix: just use the plain driver from Killer's site, skip the control center.

Cause 2: VPN or virtual adapter filter drivers

Virtual network adapters from VPN clients or hypervisors (VMware, Hyper-V, VirtualBox) install NDIS filter drivers that intercept packets. Sometimes these filters pass a buffer with wrong length. The error appears when you connect to the VPN or start a VM.

Step-by-step fix

1. Open Network Connections (ncpa.cpl from Run dialog).
2. Look for adapters named like "NordVPN Tunnel", "WireGuard Tunnel", or "VMware Virtual Ethernet Adapter".
3. Right-click the VPN adapter → Properties. Uncheck any entries under "This connection uses the following items" that aren't basic TCP/IP v4 and v6. Specifically uncheck items like "VPN Network Filter" or anything with your VPN provider's name.
4. Disconnect the VPN completely. Reboot.
5. If the error stops, reinstall the VPN client fresh from the vendor's website. Use the latest version — older builds had known buffer bugs.

For Hyper-V users: The error can come from the "Hyper-V Virtual Ethernet Adapter" when you set up an external switch. Fix: In Hyper-V Manager, go to Virtual Switch Manager, delete the external switch, recreate it. This resets the NDIS filter chain.

Cause 3: Corrupted NDIS stack or registry

Less common but happens after a failed Windows update or driver rollback. The NDIS.sys file itself gets corrupted, or registry keys under HKLM\SYSTEM\CurrentControlSet\Services\NDIS get wrong values (e.g., Start set to 4 instead of 1).

Step-by-step fix (advanced)

1. Open Command Prompt as Admin.
2. Run sfc /scannow to check system files. If it finds corruption, run DISM /Online /Cleanup-Image /RestoreHealth and restart.
3. If SFC found nothing, run netsh int ip reset and netsh winsock reset. These commands reset the TCP/IP stack and Winsock catalog, which interact with NDIS.
4. If still broken, open Regedit and go to HKLM\SYSTEM\CurrentControlSet\Services\NDIS. Check Start value — must be 1 (system boot). If it's 4 (disabled), change to 1. Also check ImagePath points to system32\drivers\ndis.sys.

Why registry matters: NDIS loads during boot. If the Start key is 4, the driver never loads, and any network call returns buffer errors. I've seen malware or sloppy driver uninstallers flip this key.

Quick-reference summary table

Real talk: 9 times out of 10, it's the NIC driver. Don't waste time on DISM scans first — go straight to the driver reinstall. That's the fastest way to kill this error.