Windows 10: Windows Update Install Error - 0x800700c1

I've followed many forums and have taken those troubleshooting steps, but no luck. I'm hoping someone can help me directly. I have Windows 11.

:)

 

Error 0x800700c1 in windows 10

I have got the error 0x800700C1 and could not update KB3115259, KB3167685, KB3163018 & KB3149135 since a week ago. I tried both you two methods but the result was the same. I don't wish to follow hbja to go back to "Factory Setting". Can you help me sort
it out with other solutions?

 

Error 0x800700c1 in windows 10

Hi,

Thank you for posting your query on Microsoft Community.

Share this information to assist you better.

• Which build is currently installed in your computer?
• Do you have any anti-virus program installed?

The error code 0x800700C1 occurs because the Windows Authenticode Signature Verification function now verifies portable executable (PE) files.

I suggest you to follow the methods below and check if you can install the updates:

Method 1: Run Windows Update Troubleshooter

I suggest you to run the Windows Update Troubleshooter. Follow these steps to run Windows Update
troubleshooter:

• Press Windows key + W and type
  troubleshooting.
• Select Troubleshooting.
• Select View all on the top left corner.
• Click Windows Update troubleshooter.
• Follow the on-screen instructions to run the troubleshooter.
• Check if issue persists.

If the issue persists, follow next method.

Method 2:

I suggest you to check if the services responsible for Windows update is running. Refer to these steps:

• Press Windows key +R, type “services.msc”
• Locate the BITS, Cryptographic, MSI Installer
  and the Windows Update Services and check if it is running.
• If not, right click on the service and click start to start the service.

Hope this helps, let us know the status of the issue. We will assist you further.

 

Windows 10 Updates still not taking (Error 0x800700c1)

Steps 1-3 completed, on Step 4: no pop-up box with Defer upgrades option.

There was a drop-down box for "Notify to schedule restart" (this was selected) and another for "Automatic." I changed to Automatic and attempted to download and install upgrades again. No luck. I also followed the link to the Microsoft Update Catalog to
manually download and install Updates.

Update for Windows 10 Version 1511 for x64-based Systems (KB3181403) - Error 0x800700c1

-downloaded, did not install.

Security Update for Windows 10 Version 1511 for x64-based Systems (KB3172729) - Error 0x800700c1

-showed the following:





Security Update for Adobe Flash Player for Windows 10 Version 1511 (for x64-based Systems) (KB3202790) - Error 0x800700c1

-downloaded but did not install

Cumulative Update for Windows 10 Version 1511 for x64-based Systems (KB3198586) - Error 0x800700c1

-downloaded but did not install