Windows 10: Windows 10 update from 1909 to 2004 keeps failing - Error 0xc1900204

I am trying to do windows 10 Pro update from 1909 to 2004 and it keeps failing with the following error code;


Feature update to Windows 10, version 2004 -Error 0xc1900204


It was failing consistently at 10%, I looked for solutions and found a tech net article that described several things to try, including;

checking registry keys for install folder

checking/repairing system files it did find two it corrected but it still fails the same

Deleting softwaredistribution folder and index file via powershell.


All made no difference, so today I have done the following;


Repeated above, all okay no erros, freed up 35GB space on C:\ drive, turned off antivirus and tried the install again.


Now still failing but at 31% and consistently.


Please help!!!

:)

 

Update Error - 0xc1900204 - Version 1909 - SSD Boot

Hello All,

I'm having problems with Windows Update version 1909, I am getting error code 0xc1900204.

I have performed all the steps as outlined in windows 10 anniversay update Error 0xc1900204 but have had no success.

My current setup:

SSD - Bootdrive (C Drive)

HD - All other files (A Drive)

All content is saved to the A Drive: New Apps, New Documents, Music, Photos, etc.

I am thinking I my not have edited the registry editor option correctly. Per troubleshooting with the registry editor, I changed "ProgramFilesDir" values to C and it still didn't work. Below is a list of over values in the folder, should I redirect all
to C?

 

Update from 1909 to 2004 fail for Error 0xc1900209

Hi, that looks as if it's a UEFI installation.

I'm wondering where your 16Mb Reserved partition is...




See e.g.
Recover Deleted System Reserved Partition in Windows 10/8/7 – EaseUS
where e.g. Method 3 may help.

I commented:

Apart from the partition issue, I suggested you could try upgrading after a clean boot.

 

Error 0xC1900101 when upgrading to Windows 10 2004 from 1909

Hi, I've been trying to install the Windows 10 2004 several times already, but when it reboots it just keeps loading something for a while and then the PC boots back into 1909 without any error message. After checking the event viewer, it says "Installation
Failure: Windows failed to install the following update with error 0xC1900101: Feature update to Windows 10, version 2004."