Windows 10: 0x800700c1 error code, cant update, tried everything i could as someone who doesnt...

My windows updates are failing since the recent update.I cant use sfc /scannow, get the "Windows Resource Protection could not start the repair service".Cant reset the pc either cuz it cant update.Ive tried updating via ISO file too.Version 10.0.22631 Build 22631

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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?

 

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 on windows update - (KB4056892) - Errore 0x800700c1

Hi Luca,

A corrupted Windows Update components is one of the possible reasons why you are having the error code 0x800700c1 when installing the Windows Update KB4056892. For us to assist you better, kindly answer the questions below:

• Have you made any changes to your computer prior to this issue?
• What troubleshooting steps have you done so far?
• Do you have a third-party security software installed?
• Have you tried to use the
  Windows Update troubleshooter?

Meanwhile, you can follow the troubleshooting steps in this
link to resolve Windows Update issues.

We'll be looking forward to your reply.