Windows 10: Download error - 0x800700c1

Hi, Since about October 2023 I have been trying to download some updates for Windows 11, yet I'm always getting a download error "Download error - 0x800700c1".I checked this page and saw people with the same issue in the past but none of those solutions worked for me, can I please have some help?Since then I've had some minor security updates etc which have downloaded fine but "2023-10 Update for Windows 11 Version 22H2 for x64-based Systems KB4023057", and "2024-01 Cumulative Update for Windows 11 Version 22H2 for x64-based Systems KB5034123" both won't install.My graphics drivers are upd

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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.

 

1511 to 1607 Update Error 0x800700c1

I have Windows 10 Pro Version 1511, OS Build 10586.589.

Windows continually attempts to download and install the anniversary upgrade.
The download completes, but the installation fails with error code 0x800700c1.
This has happened more than 50 times.
(As appears quite common, I have never experienced an update error before.)

I have tried every suggested fix I can find - nothing works.
I have tried installing from 1607 ISO - fails
I have tried installing using Windows10Upgrade28084.exe - fails
I have tried letting Microsoft Support have a go - fails

I am unable to find the meaning of the error code above, so there seems to be no way to effect action here.
Does anybody have any knowledge on this one?