Fix Error 0xC004C008 — Windows & Office Activation
Error **0xC004C008** appears when the MAK key has been used too many times. KMS GVLK keys are not limited but MAK keys have a fixed activation count. This page shows the exact fix that works in 2026 on every Windows version and every Office edition.
What error 0xC004C008 actually means
Activation count exceeded for product key. The MAK key has been used too many times. KMS GVLK keys are not limited but MAK keys have a fixed activation count.
The fix that works (2026)
Use the KMS activator instead — it uses GVLK keys with unlimited activations. Or run KMSFull.com which auto-selects the right key for your edition.
Step-by-step recovery
- Open PowerShell as Administrator (Win+X → Terminal (Admin))
- Run slmgr /upk to remove any blocked product key
- Run slmgr /rilc to reload the licensing cache
- Reboot Windows
- Download KMSFull.com
- Run KMSAuto.exe as administrator and pick the right method (HWID for Home/Pro, KMS for Enterprise, Ohook for Office)
Still seeing 0xC004C008?
If the error persists, the most common remaining cause is third-party antivirus blocking the activation request — temporarily disable it and retry. See the full FAQ for advanced diagnostics.
Frequently asked questions
▸What does error 0xC004C008 mean?
Activation count exceeded for product key. The MAK key has been used too many times. KMS GVLK keys are not limited but MAK keys have a fixed activation count.
▸How do I fix 0xC004C008 quickly?
Use the KMS activator instead — it uses GVLK keys with unlimited activations. Or run KMSFull.com which auto-selects the right key for your edition.
▸Will KMSFull.com fix 0xC004C008?
Yes — KMSFull.com 2026 handles 0xC004C008 automatically by switching activation method, refreshing the GVLK, and retrying with elevated rights. Download and run directly — no password needed.
▸Does this error affect Windows or Office?
Error 0xC004C008 can appear on both Windows (slmgr) and Office (ospp.vbs / Click-to-Run). The fix is identical — restore the licensing store and re-run a working activator.
Get KMSFull.com Now
Free, safe and open source — supports every Windows & Office release through 2026.
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