[SOLVED] Windows 10 home 21H2: Error 0x800700c1 in Windows Update when try to update to windows11. SFC could not start the repair service

[maestro]

Hello,

I've seen this exact issue elsewhere on this forum, so I'm hopeful we can reach a resolution for me as well! Windows updates have been failing for a long while. I'm also unable to install an in-place upgrade using either an unmodified ISO or a Rufus boot USB with the compatibility checks disabled.

many thanks from detail instructions. i am not so pro with these!

 

[Windows Update Bot]

Hi @maestro,

Welcome to Sysnative Forums!

If you haven't already, please review the posting instructions here, and attach the requested log files. Without log files, our helpers will not be able to assist, and this will slow down fixing your machine.

If logs have been already been provided, our team of volunteers will analyse the provided log files to build a fix for your system. Please be aware that this may take several days from your initial post, due to the high volume of threads that we receive.


- Sysnative Windows Update Team

 

[maestro]

here are these two files for you also!

 

[maestro]

and if we get correction here. maybe also give me link which is best way to update to windows11. i quess you dont really recommend basic Windows update for that one.

 

[Maxstar]

Hi and welcome to Sysnative,

Step 1. Download

SFCFix and save it to your desktop.

Warning: This fix was written specifically for this system. Do not run this fix on another system.

• Save any work you have open, and close all programs.
• Download the attachment SFCFix.zip and save it to your desktop.
• Drag the SFCFix.zip file over the SFCFix.exe executable and release it.

• SFCFix will launch, let it complete.
• Once done, a file will appear on your desktop, called SFCFix.txt.
• Post the logfile (SFCFix.txt) as attachment in your next reply.

Step 2. Run the following DISM command and post the result. If it fails attach a new copy of the CBS log.

DISM /online /cleanup-image /RestoreHealth

 

[maestro]

thanks a alot! sfcfix file attached here. and screenshot for DISM command below.

put also dism log here and new cbs log. for cbs log did not do step 1 and step 3. let me know if those are also needed for new cbs log.

 

[Maxstar]

Here's the next fix.

Step 1.
Warning: This fix was written specifically for this system. Do not run this fix on another system.

• Save any work you have open, and close all programs.
• Download the attachment SFCFix.zip and save it to your desktop.
• Drag the SFCFix.zip file over the SFCFix.exe executable and release it.

• SFCFix will launch, let it complete.
• Once done, a file will appear on your desktop, called SFCFix.txt.
• Post the logfile (SFCFix.txt) as attachment in your next reply.

Step 2. Run the following DISM command and post the result. If it fails attach a new copy of the CBS log.

DISM /online /cleanup-image /RestoreHealth

 

[maestro]

here we go. not going through dism.

 

[Maxstar]

This is normal in such cases, because we'll need to apply multiple fixes.

Step 1.
Warning: This fix was written specifically for this system. Do not run this fix on another system.

• Save any work you have open, and close all programs.
• Download the attachment SFCFix.zip and save it to your desktop.
• Drag the SFCFix.zip file over the SFCFix.exe executable and release it.

• SFCFix will launch, let it complete.
• Once done, a file will appear on your desktop, called SFCFix.txt.
• Post the logfile (SFCFix.txt) as attachment in your next reply.

Step 2. Run the following DISM command and post the result. If it fails attach a new copy of the CBS log.

DISM /online /cleanup-image /RestoreHealth

 

[maestro]

yeap that was my thinking also...now it seems it went through normally?

here we go new set.

 

[Maxstar]

Great, since this is an old build I would suggest to install Windows 10 22H2 first with the following tool.

Download the

Windows 10 Update Assistant to your desktop.

• Right-click on Windows10Upgrade9252.exe and select the option: Run as administrator.
• Press the Update now button, click after the compatibility check on Next.
• The Update Assistant will now download the latest Feature Update.
• After verifying the download, the Feature Update will be installed.
• When this process is ready, click on the Restart now button to complete the installation.

 

[maestro]

ok i will do that now. how about going to windows 11 after this update? what would be best way to do it?

 

[Maxstar]

When Windows 10 22H2 is installed I would first make a complete system image, so you can always restore the system when Windows 11 is not running well or causing issues. I assume this system meets the minimal hardware requirements for Windows 11?

 

[maestro]

yes windows update page showing green light there that you system is good to go for windows11.

maybe giving me instruction for making system image and the way i should then update to windows11? i quess needs to be done anyway because windows 10 support end during this year anyway.

 

[Maxstar]

There are several ways to make a system image:

- Hasleo Backup Suite Free - Free Windows Backup Software for Windows in 2025 - Hasleo Backup Suite
- Macrium Reflect (30 day trial) - https://www.macrium.com/reflectfree

For Windows 11 you can install it from the Windows Update Settings screen, or the following tool.

Download the

Windows 11 Installation Assistant to your desktop.

• Right-click on Windows11InstallationAssistant.exe and select the option: Run as administrator.
• Press the Update now button, click after the compatibility check on Next.
• The Update Assistant will now download the latest Feature Update.
• After verifying the download, the Feature Update will be installed.
• When this process is ready, click on the Restart now button to complete the installation.

 

[maestro]

thanks. i will to that windows 10 update first. then image with hasleo. and going with update setting screen to update for windows11.

i will send later today one more message - if/when - everything is done without any problems!

 

[Maxstar]

You're welcome. And let's hope that there are no remaining issues with the update/upgrade to Windows 11..

 

[maestro]

yeap windows 11 is up and running!

than you so much from your superb help maxstar! you save the day and weekend also! all the best for you and have a nice weekend!

 

[Maxstar]

You're welcome. Glad I could help to resolve this issue and have a nice weekend too!