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Free Fix 0x803FABBC

0x803FABBC and 0x803FABBE: Activation Throttled After Too Many Tries

9 min read Updated October 5, 2026 Windows Activation & Licensing

Fix it now

Microsoft publishes no meaning for any of these codes and no waiting period, so ignore anyone who quotes you one. What is reliable: they appear after repeated attempts, retrying keeps them there, and there is almost always an earlier error underneath that nobody looked at. Find that one.

Elevated Command Prompt. Read the licence state rather than attempting activation again

cscript //nologo %windir%\system32\slmgr.vbs /dlv
  1. Stop retrying, and close the activation troubleshooter. Every further attempt keeps you where you are.
  2. Find any script, scheduled task or deployment step that calls activation on a schedule, and disable it for now.
  3. Look for the error that was happening before this one: read the /dlv output, and check the Application log for Software Protection Platform entries from before the attempts started.
  4. Fix that error on its own terms, then attempt activation once – not repeatedly – the next day.

Nothing here costs money. There is no product that removes a refusal of this kind and no licence that exempts you from one.

If the code changes after a wait, you are past this and looking at the real error. The next section covers how to tell that apart from something that is not going to clear.

Why it happens

Activation is a shared service handling requests from an enormous number of machines, and services like that protect themselves against repetition. That is the general shape of what people describe as throttling. It is worth being clear that Microsoft publishes neither a meaning for 0x803FABBC, 0x803FABBD, 0x803FABBE or 0xC004F06A, nor any duration for a cooldown, so every specific figure circulating for these codes was invented by somebody.

What Microsoft does publish, for a neighbouring set of codes, is instructive. 0xC004C012, 0xC004C013 and 0xC004C014 are documented as the activation server being temporarily unavailable, with the statement that Windows will activate automatically when the service comes back online. 0x87E10BC6 is documented as an error on the activation server or in the licensing service, with the recommended action being to wait a few minutes and then run the troubleshooter. In both cases the documented response is to stop and let it clear.

That is the useful principle here, and it holds whether or not a throttle is what you are looking at. Windows retries activation on its own schedule. A person clicking the troubleshooter repeatedly, or a task sequence calling activation in a loop, adds nothing except more failures – and destroys the evidence of what was failing first, which is the thing you actually need.

A script or task sequence is retrying activation in a loop

You have this one if A deployment task, startup script or monitoring job calls activation repeatedly, and the failure returns as soon as it clears.

  1. Find the caller. Check scheduled tasks, startup scripts and any deployment step that runs slmgr /ato.
  2. Disable it until the underlying activation problem is resolved.
  3. Reintroduce it with a sensible interval and a retry limit, rather than a tight loop.

Windows already retries activation by itself. A script that forces it more often adds nothing useful.

The troubleshooter was run over and over

You have this one if Somebody worked through the activation troubleshooter many times in one sitting, and it now fails immediately every time.

  1. Close it and leave the machine for the rest of the day.
  2. Meanwhile, establish the real state with slmgr /dlv so you know what you are actually fixing.
  3. Run the troubleshooter once, later, after the underlying cause has been addressed.

Many machines are activating from one account or licence at once

You have this one if A batch of virtual machines or rebuilt devices was activated in a short window, and later ones fail while earlier ones succeeded.

  1. Pause the remaining activations and space them out.
  2. For a fleet, move to a volume activation method rather than activating each device individually against one account.
  3. Resume later, at a slower rate.

If one licence really is being applied to many distinct devices, the refusal is the smaller problem. Check the entitlement covers them.

An underlying failure is being retried instead of diagnosed

You have this one if Activation was already failing for another reason, and repeated attempts eventually produced this code on top.

  1. Read the last error from before the retries started, from slmgr /dlv and the Application log.
  2. Resolve that error on its own terms, whether it is network, key, edition or entitlement.
  3. Attempt activation once afterwards rather than testing repeatedly.

Full reference

Is it going to clear, or is it not?

What you observe What it suggests
The failure appeared after many attempts in a short period Something transient. Stop and wait
The failure appeared on the very first attempt Not this article. Look at the underlying licensing state
Waiting a day changes the code to something else It has cleared, and the real error is now visible
Waiting changes nothing at all over several days Something more persistent; work through the blocked-and-refused article instead
Other machines on the same network activate normally Whatever it is applies to this device, licence or account rather than your network
The code is 0xC004C012, 0xC004C013 or 0xC004C014 Documented: Microsoft’s service is temporarily unavailable and Windows will activate itself

The documented codes that mean wait

Code Documented meaning Documented action
0xC004C012 The activation server is temporarily unavailable None. Windows activates when the service returns
0xC004C013 The activation server is temporarily unavailable None. Windows activates when the service returns
0xC004C014 The activation server is temporarily unavailable None. Windows activates when the service returns
0x87E10BC6 An error on the activation server or in the licensing service Wait a few minutes, run the troubleshooter, then open Microsoft Store
0xC004E028 The device is already in the process of being activated Let the first request complete

That last row is worth knowing about, because it is the documented version of exactly the mistake this article is about. If two activation attempts are in flight at once, Microsoft documents the second one failing with 0xC004E028 and the device activating once the first completes. Clicking again is what causes it.

Finding the error that came first

  1. Open Event Viewer and filter the Application log by the Security-SPP source.
  2. Work backwards to the entries from before the repeated attempts started. That is where the original failure is.
  3. Read slmgr /dlv in full: the licence status, whether a key is installed, and the channel.
  4. Match the original code against its own article rather than this one.
  5. Only once that is fixed, attempt activation a single time.

What not to do

  • Do not reinstall Windows. It generates further activation attempts from the same device and destroys the log evidence of the original error.
  • Do not quote yourself a cooldown period. Microsoft does not publish one for these codes, and neither can anybody else.
  • Do not change the product key in the hope that a different one behaves differently. If the key was fine before the retries, it is fine now.
  • Do not run the troubleshooter to check whether the problem has gone. That is another attempt.
  • Do not buy anything. Nothing here is a licensing shortfall, and no purchase changes a refusal of this kind.

Every code this article covers

Code What it points at Source
0x803FABBC Appears after repeated reactivation attempts. Microsoft publishes no meaning and no duration; stop retrying and diagnose the error that preceded it not published by the vendor
0x803FABBD A related refusal in the same circumstances. No published meaning not published by the vendor
0x803FABBE Reported when reactivation is refused after repeated attempts. No published meaning not published by the vendor
0xC004F06A Raised by the licensing service when a further attempt is declined. No published meaning not published by the vendor

Confirm the fix worked

  1. slmgr /ato, run once after a wait, returns a different code or succeeds.
  2. slmgr /dli reports Licence Status: Licensed.
  3. No scheduled task, script or task sequence step is still calling activation on a short interval.
  4. The Application log shows no repeating Security-SPP failures after the change.

Questions people ask about this

How long do I have to wait?

Microsoft does not publish a figure for these codes, so anyone quoting you one is guessing. Stop retrying, deal with the error that came first, and try once the next day. For the codes Microsoft does document as a temporary service problem, the published guidance is that Windows activates by itself once the service returns.

Does this mean my licence is in trouble?

There is nothing published to say so. If the code clears and activation then succeeds, there was never anything wrong with the licence at all – which is the most common outcome.

Will reinstalling Windows clear it?

No, and it will probably make things worse. A reinstall generates further activation attempts from the same device, and it destroys the log evidence of what the original error was.

Does fixing this cost anything?

Nothing at all. There is no product that removes a refusal of this kind and no licence that exempts you from one. The only actions that help are stopping the retries and fixing whatever was failing underneath.

How do I know it is not something permanent?

Time is the only test. Attempt once, wait a day, attempt once more. A transient refusal changes; something more persistent produces exactly the same result days later, and at that point you are reading the wrong article.

Related error codes

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