Windows update C8000266 indicates Microsoft windows can not be updated and the upgrade will stop. In this article we have given step by step instructions to resolve the issue.
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The steps given below involves changing system setting and it can damage your PC if the steps are not followed properly. It is highly recommended that these steps should be followed under supervision of an Expert technician. We will have no responsibility or liability in relation to any loss or damage that occurs in the process.
Affected Operating Systems:
Common Error message:
Reason for error:
The error usually occurs while updating windows, upgrading windows and installing new windows updates. Windows update can also cause Microsoft office (Outlook,Word,Excel etc) to throw C8000266 error. The error can occur due to following reasons:
How to Fix Windows update C8000266 error:
Open Command Prompt in elevated mode. To open Command prompt in Windows 10, type CMD in search bar (“Ask me anything“) and right click on it and Click on “Run as Administrator“. And in the next window click on Yes.
In command prompt type the following command:
Sometimes Skype and any installed antivirus can conflict with windows update. While updating the windows disable them. You can enable them once the update is done successfully.
If Windows update C8000266 error still persists even after following the above steps, it means the issue is critical and it should be fixed by manually replacing the update files. It is highly recommended to talk to one of our Support specialist to get the issue resolved.
Posted In: Windows Update
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