Windows 10: Windows Updates failing with code 0x800700C1

Hi. I have a copy of Windows 10 that refuses to update. There are multiple updates that continually fail to install.They are:KB4577586: Update for the removal of Adobe Flash Player: October 27, 2020KB5003254 Cumulative Update for .NET Framework 3.5 and 4.8They all fail with the error code 0x800700C1There is an additional optional update that fails with a different code:KB5003637It fails with code 0x80073712I've ran the trroubleshooter for Windows Update, and it says that it fixed the problem, but the problem still persists. I can not run afc /scannow from the CMD. CMD returns "Windows Resource

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Anniversary Update fails with error 0x800700c1

Using Windows 10 Upgrade Assistant Anniversary update fails with 0x800700c1. Checking update history shows other updates are installing but Anniversary failing for the past several weeks. Troubleshooting Windows Update (both program and manual steps) has
no effect.

Update proceeds to 85% (very slow after 71%) at which point error 0x800700c1 is received. If "Try Again" is selected update proceeds to 71% whereupon white update window closes and blue update window opens and eventually closes with pop-up advising failure.
Clicking OK returns to white update window with error 0x800700c1 notification.

HP Probook 450 G3

Win 10 Pro 1511

 

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.