Windows 10: Windows 10 Update to 20H2 Gets Error "Can't Update Reserved Partition"

I asked about this before, and was given a link to Microsoft Support to change the name of the Reserved Partition to "Y" and then a couple more commands to delete files, I guess. I wasn't comfortable doing that. I'm not an advance user. However, I went back and looked at Disk Management, and there is no problem with the System Reserved Partition being too full. In fact, it's 100% available. I had a screenshot of the Disk Management window, but I can't paste it here.The one I think is the System Reserved Partition is called EFI System Partition, and has 100 mb capa

:)

 

W10 System Reserved Partition Error

Hi,

Have you tried all the suggestions above? If not, we suggest the resolution provided above. We also suggest that you follow the steps on this link:

“We couldn’t update system reserved partition” error installing Windows 10.

Let us know how it goes.

 

We couldn't update the system reserved partition - Windows 10 1803 Updates won't install

The usual suggestion is to clean it out.

https://support.microsoft.com/en-us/help/3086249/we-couldn-t-update-system-reserved-partition-error-installing-windows

Are you implying DISM is showing a message about bootmgr? What is the message exactly? You may need to use a different DISM syntax and point to a /source:

Otherwise it may be bogus. For a possibly related incident see

https://answers.microsoft.com/en-us/windows/forum/windows_10-update-winpc/windows-10-update-kb3213986-fails-repeatedly-with/46d9b1af-71a6-4d39-acaf-c3882047ac12

What are the details for that?

HTH

Robert Aldwinckle

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Error: we couldn't update the reserved partition when trying to upgrade from Windows 7 to 10

Hi,



Thank you for writing to Microsoft Community Forums.



I understand that you receive an error “we couldn't update the reserved partition” when trying to upgrade from Windows 7 to 10. I’ll certainly help you with this issue.



However, please let us know:

• How are you trying to upgrade the computer?
  
• What is the make and model of the computer?
  

Meanwhile, I would suggest you to refer the steps mentioned in the article

“We couldn’t update system reserved partition” error installing Windows 10.



Caution: these steps are complicated, and carry some risk. This is best done by advanced users with experience using the command line. If you make an error in entering these commands, you could put your device in a
no-boot situation, and possibly lose data you have stored on the device.



Let us know the results.



Regards,

Nikhar Khare

Microsoft Community - Moderator