If you receive Windows Update error 800b0001, it means that Windows Update or Microsoft Update cannot determine the cryptographic service provider. The System Update Readiness Tool can correct some conditions that cause this error. To use the tool, follow these steps:

  1. Go to the System Update Readiness Tool webpage. In the Information for advanced users section, find the version of Windows and system type of your computer, and then click the link to download the System Update Readiness Tool. If you don't know which version of Windows you have, see View your computer information.

  2. Run Windows Update again.

    Note

    • Typically, the scan takes 15 minutes or less, but it can take longer on some computers. The Windows Update progress bar is not updated during the scan, and progress seems to stop at 60% complete, for some time. This behavior is expected. The scan is still running and you should not cancel the update.

If you continue to see this error, see this automatic troubleshooter on the Microsoft Support website, or go to the Microsoft Answers website for more assistance.

Error codes this applies to:

  • WindowsUpdate_800B0001

  • 0x800B0001