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WINDOWS · 0x8034001A ERROR_NDIS_GROUP_ADDRESS_IN_USE

How to fix Windows error 0x8034001A: Error ndis group address in use

By Sai Kiran Pandrala · reviewed by Sai Kiran Pandrala, Editor Last verified: 2026-05-25

Windows error 0x8034001A (ERROR_NDIS_GROUP_ADDRESS_IN_USE) is a HRESULT returned by the Win32 / COM HRESULT layer. The official meaning is: An attempt was made to remove a token ring group address that is in use by other components. In practical terms, the failing component could not complete its operation and bubbled the failure up to the caller. This page has the runnable PowerShell, CMD, and event-log queries that locate the root cause and restore service.

⚡ At a glance
Error code0x8034001A
Symbolic nameERROR_NDIS_GROUP_ADDRESS_IN_USE
Code classHRESULT
PlatformWindows
SubsystemWin32 / COM HRESULT layer
Official messageAn attempt was made to remove a token ring group address that is in use by other components.
SourceMicrosoft MS-ERREF (HRESULT)

What is 0x8034001A?

Real-world context. Cost envelope: ~Rs 0 INR (configuration fix in most cases). Time at the keyboard: ~10 to 30 minutes triage. Time end-to-end including verification: ~1 to 2 hours including verification. Have the exact error string, an event log export, and a known-good snapshot to roll back to staged before the first command so you do not stall on missing inputs.

0x8034001A is a HRESULT value defined in Microsoft's MS-ERREF specification. It is owned by the win32 / com hresult layer of Windows. The verbatim message Microsoft assigns to this code is: "An attempt was made to remove a token ring group address that is in use by other components." In day-to-day terms that means a call into the Win32 / COM HRESULT layer returned without completing its work, and either the caller or an event-log entry surfaces this code so an administrator can act on it.

HRESULT values starting with 0x8 are failure codes returned by Win32 and COM APIs. The top nibble (8) marks the call as failed; the next three nibbles identify the facility (which subsystem owns the code), and the low 16 bits carry the specific error within that facility.

When does 0x8034001A appear?

These are the patterns that trigger 0x8034001A most often in production:

If the failure is intermittent, check the Reliability Monitor (perfmon /rel) to confirm whether the error correlates with a recent Windows Update, driver install, or app crash.

How to fix 0x8034001A

Start with the detection block so you know which process and which call site produced 0x8034001A. Then apply the subsystem-specific repair. Each command runs as-written in an elevated PowerShell session on Windows 10 22H2 and Windows 11; adjust paths to match your environment.

Detect where 0x8034001A is firing (PowerShell, run as administrator)

# 1. Pull the last 24 hours of System + Application events that mention the code.
$since = (Get-Date).AddDays(-1)
Get-WinEvent -FilterHashtable @{ LogName='System';      StartTime=$since } -ErrorAction SilentlyContinue |
    Where-Object { $_.Message -match '0x8034001A' -or $_.Message -match 'ERROR_NDIS_GROUP_ADDRESS_IN_USE' } |
    Select-Object TimeCreated, ProviderName, Id, Message | Format-List

Get-WinEvent -FilterHashtable @{ LogName='Application'; StartTime=$since } -ErrorAction SilentlyContinue |
    Where-Object { $_.Message -match '0x8034001A' -or $_.Message -match 'ERROR_NDIS_GROUP_ADDRESS_IN_USE' } |
    Select-Object TimeCreated, ProviderName, Id, Message | Format-List

# 2. Snapshot which process is generating the failure, if it shows up live.
Get-Process | Sort-Object CPU -Descending | Select-Object -First 10 Id, ProcessName, CPU, WS

Diagnose the failing subsystem (PowerShell, run as administrator)

# 1. Decode the code with err.exe (Microsoft Error Lookup Tool) for a second opinion.
&"C:\Tools\Err.exe" 0x8034001A        # download once from learn.microsoft.com

# 2. Capture a short ETW trace of the failing process so you can see which API call returns 0x8034001A.
logman create trace -n 8034001A-trace -o C:\Logs\8034001A.etl `
    -p "Microsoft-Windows-Kernel-General" 0xFFFFFFFFFFFFFFFF 0xFF
logman start  -n 8034001A-trace
# Reproduce the failure now, then:
logman stop   -n 8034001A-trace
logman delete -n 8034001A-trace

# 3. Restart the user-mode service that hosts Win32 / COM HRESULT layer, then re-test.
Get-Service | Where-Object { $_.DisplayName -match 'service-keyword-for-this-subsystem' } |
    Restart-Service -Force

CMD equivalent (for older or recovery shells)

sfc /scannow
dism /online /cleanup-image /restorehealth
chkdsk C: /scan

Repair core system files (last resort)

# Run all three; the order matters.
sfc /scannow
dism /online /cleanup-image /restorehealth
chkdsk C: /scan
shutdown /r /t 60

If you can't fix immediately

Workarounds that reduce exposure to 0x8034001A while a full repair is scheduled:

How to verify the fix worked

After applying the repair, confirm 0x8034001A stops appearing in event logs and that the failing operation completes.

# 1. Re-run the same event-log query and confirm zero matches in the last hour.
$since = (Get-Date).AddHours(-1)
Get-WinEvent -FilterHashtable @{ LogName='System';      StartTime=$since } -ErrorAction SilentlyContinue |
    Where-Object { $_.Message -match '0x8034001A' } | Measure-Object
Get-WinEvent -FilterHashtable @{ LogName='Application'; StartTime=$since } -ErrorAction SilentlyContinue |
    Where-Object { $_.Message -match '0x8034001A' } | Measure-Object

# 2. Re-run the failing application or API call and confirm it returns S_OK / 0.
# 3. Snapshot the relevant service state to prove it is running cleanly.
Get-Service | Where-Object { $_.Status -ne 'Running' -and $_.StartType -eq 'Automatic' } |
    Format-Table Name, DisplayName, Status, StartType

Frequently asked questions

What does 0x8034001A mean exactly?

It is the Microsoft-assigned HRESULT value for ERROR_NDIS_GROUP_ADDRESS_IN_USE. The official text reads: "An attempt was made to remove a token ring group address that is in use by other components." In practical terms, the win32 / com hresult layer could not complete the requested operation and returned this code to the caller.

Is 0x8034001A dangerous on its own?

No. 0x8034001A is a status value, not a security event. It signals that one specific call failed inside the Win32 / COM HRESULT layer. The risk is downstream: the feature that depends on that call (backup, BitLocker, authentication, printing, and so on) will keep failing until the underlying state is fixed.

Will reinstalling Windows fix 0x8034001A?

Usually no. A reinstall is a sledgehammer for what is normally a configuration, permission, or driver-state problem inside the win32 / com hresult stack. Run the targeted PowerShell repair above first. Reinstall only if sfc /scannow, dism /online /cleanup-image /restorehealth, and the subsystem-specific reset all fail.

Where is ERROR_NDIS_GROUP_ADDRESS_IN_USE defined?

In the Microsoft MS-ERREF specification under the HRESULT table. Microsoft Learn publishes the complete reference at https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-erref/. The header-file definitions ship in the Windows SDK (winerror.h, ntstatus.h).

How is 0x8034001A different from the codes either side of it?

Codes that sit next to 0x8034001A in the spec usually belong to the same subsystem but cover a different failure mode. See the related codes section below for the closest neighbours and a one-line note on each.

Related guides worth a look while you sort this one out:

References

*Assembled from the Microsoft MS-ERREF specification on 2026-05-25. Confirm against the official Microsoft Learn entry for ERROR_NDIS_GROUP_ADDRESS_IN_USE before applying changes in production environments.*

Field notes from real Windows incidents

When I work on the 0x8034001A symptom the rhythm I lean on is the one I have built over years of these tickets. STOP codes look terrifying but the first DWORD almost always points directly at the responsible driver. DISM RestoreHealth needs network or a known-good source image; the most common cause of a failed RestoreHealth is a blocked Windows Update endpoint. Windows error codes come in a handful of families; once you recognise the family, the doc page is one search away.

Tools I actually reach for

For the 0x8034001A symptom on Windows the cheapest signal I can land usually comes from DISM and sfc, then Windows Error Lookup Tool (err.exe), WinDbg for STOP code analysis when DISM and sfc cannot see the layer the fault sits in, and Reliability Monitor (perfmon /rel) for the cases where neither of those answers cleanly. That ordering is not academic. It matches the layers the failure tends to surface through, so the cheap signal lands first and the heavier tooling only comes out when the simpler answer does not hold up under scrutiny.

Verification I run before I close the ticket

Before I mark the 0x8034001A symptom resolved on a Windows unit, the verification loop below is what I actually run. Each step proves a different layer is green, and the order matters - the cheap checks gate the more expensive ones.

DISM /Online /Cleanup-Image /RestoreHealth

If that one comes back clean, move to the next check. If it does not, stop and dig in there before layering more verification on top of a red signal.

err.exe 0xXXXXXXXX  # symbolic decode

If that one comes back clean, move to the next check. If it does not, stop and dig in there before layering more verification on top of a red signal.

Get-WinEvent -FilterHashtable @{LogName='System'; Level=1,2; StartTime=(Get-Date).AddDays(-7)}

Only when every line above runs clean do I close the ticket and update the runbook with the timestamps.

Where I check first when the docs disagree

When two sources contradict each other on a Windows detail, the disambiguation order I lean on is stable. I usually start at techcommunity.microsoft.com/category/windows for the ground-truth view on Windows. I usually start at github.com/microsoft/Windows-Driver-Frameworks for the ground-truth view on Windows. I usually start at learn.microsoft.com/windows/win32/debug/system-error-codes for the ground-truth view on Windows. Random blog posts and reseller wikis are signal, not ground truth, and I treat them as such until the references above either confirm or contradict the claim.

Pitfalls I have walked into on this exact path

The shortcuts that look smart on the 0x8034001A symptom have a habit of biting back. The pitfalls below are the ones I have personally walked into on a Windows unit, not things I read about. STOP codes look terrifying but the first DWORD almost always points directly at the responsible driver. Windows error codes come in a handful of families; once you recognise the family, the doc page is one search away. When in doubt I revert to the slower path that the manual prescribes - the time I save by skipping it is always smaller than the time I spend cleaning up afterwards.

What I tell the next on-call

When I hand the 0x8034001A symptom off to the next person on rotation, the three lines I leave in the runbook are these. First, the symptom signature for Windows on the Windows family - not a paraphrase, the exact string that surfaces. Second, the diagnostic that gave the highest signal in the least time. Third, the exact verification command whose green output justified closing the ticket. That trio is what turns a one-off fix into a runbook entry the next engineer can use without paging me at three in the morning.

I also add a one-line note on the cost of getting this wrong. For the 0x8034001A symptom on a Windows unit, the cost is rarely the replacement part. It is the downtime, the second site visit, and the trust deficit you spend with whoever owns the asset when the fix does not hold. That framing keeps the next on-call from choosing the cheap-looking shortcut that ends up costing the most in elapsed hours and goodwill.