Fix Error 0x87E10BC6 — Microsoft Store and Licence Sync Failures

What triggers the code

The licensing client caches a signed licence blob locally. When that cache is stale, corrupted or signed for a different account, the confirmation call fails and Windows surfaces 0x87E10BC6 rather than a plain 'not activated' message.

Check the obvious causes

Three checks resolve the large majority of cases.

• Set date, time and time zone to automatic — a clock skew of minutes breaks signature validation
• Confirm the Microsoft account in Settings › Accounts is the one that owns the digital licence
• Run `wsreset.exe` to clear the Store cache, then reboot before retrying
• Run the built-in Activation troubleshooter in Settings › System › Activation

Reading the licence state

Confirm what Windows currently believes before changing anything.

• Run `slmgr /xpr` to see whether the licence is permanent or has an expiry date
• Run `slmgr /dli` for the licence channel (Retail, OEM, Volume) and the last five key digits
• Open Settings › System › Activation for the plain-language activation state
• For Office, run `ospp.vbs /dstatus` from the Office install folder

After hardware changes

Replacing a motherboard invalidates a hardware-bound digital licence. The Activation troubleshooter has a dedicated 'I changed hardware on this device recently' flow that lets you sign in and re-assign the licence from the previous device — this is the supported path and the only one that survives future updates.

Legal ways forward

Whatever the cause, the compliant options are the same.

• A valid Microsoft licence, digital licence or volume agreement is the only fully compliant route
• Windows runs without activation — you get a watermark and locked personalisation, security updates still install
• Office without a licence opens files read-only; the free web and mobile apps stay fully usable
• Business, school and production machines should use the organisation's own licensing agreement

Error 0x87E10BC6 System Requirements & Compatibility (2026)

Error 0x87E10BC6 is engineered for the modern Microsoft activation stack. The tool runs on Windows 7 SP1, Windows 8.1, Windows 10 (all builds from 1507 to 22H2) and every Windows 11 release including 23H2 and 24H2. Both x64 and ARM64 hardware are supported, and the activator also recognises Server SKUs such as Server 2016, 2019 and 2022. On the Office side, Click-to-Run installations of Office 2013, 2016, 2019, 2021, 2024 and Microsoft 365 are detected automatically — including LTSC channels. You do not need to uninstall a previous KMS client or remove an existing product key: the script reads the current edition through slmgr and routes it to the correct activation method (HWID for Windows, Ohook for Office).

• Windows 7 SP1 / 8.1 / 10 / 11 — all editions (Home, Pro, Education, Enterprise, IoT, LTSC)
• Windows Server 2008 R2 through Server 2025
• Office 2010, 2013, 2016, 2019, 2021, 2024 and Microsoft 365 Apps
• Architectures: x86, x64, ARM64
• .NET Framework 4.6+ (preinstalled on Windows 8.1 and later)

Error 0x87E10BC6 Troubleshooting: Common Errors & Fast Fixes

Most Error 0x87E10BC6 failures fall into three buckets: antivirus interference, missing administrator rights, or a corrupted Software Protection Service. If you see error 0xC004F074 the KMS host could not be contacted — disable Defender real-time scanning for two minutes, then re-run the activator. Error 0xC004C003 means the product key is blocked by Microsoft; switch to the HWID method, which bypasses key validation entirely by binding the licence to your motherboard's hardware ID. Error 0x80070005 (Access Denied) is always a UAC issue — right-click the executable and select "Run as administrator". If activation succeeds but reverts after reboot, open services.msc, set "Software Protection" to Automatic, and restart sppsvc.exe. For Office, run the Office Click-to-Run repair from Settings → Apps → Microsoft 365 → Modify → Quick Repair before retrying Ohook.

• 0xC004F074 — pause antivirus, re-run as administrator
• 0xC004C003 — switch to HWID (no key required)
• 0x80070005 — UAC denied, use "Run as administrator"
• Activation reverts on reboot — set "Software Protection" service to Automatic
• Office not detected — run Quick Repair, then re-run Ohook