Now I was able to install this update
KB5035845 in my Windows 10 Pro.
I wrote this documentary about it.
I cannot guarantee that there are no errors in the text.
These measures require knowledge of Windows administration.
These pages were helpful:
https://www.deskmodder.de/blog/2024...heitsupdate-kann-fehler-0x80070643-ausloesen/
KB5028997: Instructions to manually resize your partition to install the WinRE update - Microsoft Support
https://www.deskmodder.de/blog/2023...zu-kleiner-partition-anleitung-von-microsoft/
https://www.deskmodder.de/blog/2024...heitsupdate-kann-fehler-0x80070643-ausloesen/
CMD (=Command Prompt) in this explanation should always be used with administrator rights.
In principle it is necessary to enlarge the
Recovery Partition.
I recommend backing up the contents of the recovery partition to a normal drive first, as the
Winre.wim file was lost on my first attempt and I had to laboriously restore it from an installation medium.
"
reagentc /info"
shows that the Recovery Partition is noted.
e.g.
Windows Recovery Environment (Windows RE) and system reset configuration
Information:
Windows RE status: Enabled
Windows RE location: \\?\GLOBALROOT\device\harddisk0\partition3\Recovery\WindowsRE
Boot Configuration Data (BCD) identifier: 9de24810-0f27-11ef-872d-87ee807002f3
Recovery image location:
Recovery image index: 0
Custom image location:
Custom image index: 0
To edit the recovery partition,
enter via
CMD the command "
reagentc /disable".
First, check whether the disk partition style is a GUID Partition Table (GPT) or a Master Boot Record (MBR).
To do this, use the command "
list disk" in
DISKPART and see if there is an asterisk (*) in the
Gpt column. If there is an asterisk (*), it is a
GPT-Drive. Otherwise the drive is
MBR.
In my case it is a
MBR Drive.
To back it up assign a drive letter to the recovery partition (e.g.
R ) with
DISKPART
after selecting the recovery partition
"
assign letter=R"
Then look with
CMD "
R:" and with "
dir /a", what is stored there.
Go the deepest directory of
R: , which is \Recovery\WindowsRE and then
delete the attributes H and S with "
attrib -h -s *.*" .
Now back up data with
"
mkdir C:\Backup_WinRe"
and
"
copy *.* C:\Backup_WinRe" .
With
DISKPART select the partition which has the info
Boot in "
list volume”.
Now hope that you can shrink this partition with:
"
shrink desired=250 minimum=250"
If that worked, you can move on to recreate the
Recovery Partition.
With
DISKPART select the
Recovery Partition and with the command
"
delete partition override" delete the partition.
In my case
with the MBR drive, the partition with the maximum remaining size, recreate the partition with:
"
create partition primary id=27"
Otherwise, consult the pages mentioned at the beginning.
With "
list part" you can see that the newly created partition is selected and is from Type
Recovery.
Now format it with:
>
format fs=ntfs label="Windows RE tools"<
It is recommended to set the id again:
In my case
with the MBR drive:
"
set id=27"
Otherwise, consult the pages mentioned at the beginning.
with "
list vol" you can also see the label
Windows RE .
after "
assign letter=P" (now I had to use a different drive letter)
and "
exit" out of
DISKPART
Now via
CMD open drive
P: and recreate the directories as they were before the deletion:
"
mkdir P:\Recovery\WindowsRE"
Now go to the directory where the files were saved and in my case copy them with:
"
C:"
"
cd \Backup_WinRe"
"c
opy *.* P:\Recovery\WindowsRE"
Finally these commands:
"
reagentc /setreimage /path P:\Recovery\WindowsRE /target C:\Windows"
"
reagentc /enable"
"
reagentc /info"
showed that everything is fine again
After a reboot there were no more errors with Windows Update KB5035845
and few Windows updates followed with the necessary restart.
However later I noticed that the Windows Update
KB5034441 cannot be installed.
It breaks with the error
0x80070643.
I have used similar methods as described above.
DISKPART showed that now
2 Recovery Partitions exist.
reagentc /info
showed that the previous partition is registered.
So I started again
reagentc /disable
Now I assigned a drive letter to the 2nd new Recovery Partition and recognized via "
dir /a" that a new Winre.wim is available, now larger.
Similar to what was described above I
saved the contents in
Recovery\WindowsRE of this
2nd Recovery Partition .
Then with
DISKPART I deleted both
Recovery Partitions .
Like described above I created a new one and copied the newly created backed up files into the
Recovery\WindowsRE path of that partition.
As above, I concluded with:
"
reagentc /setreimage /path P:\Recovery\WindowsRE /target C:\Windows"
"
reagentc /enable"
"
reagentc /info"
showed that everything was fine again.
After
Reboot all Windows updates were error-free.
