98SE — LTSB — 0x80070643
How to fix Windows Update Error 0x80070643
This guide was made for Windows 10, however it should also work on newer and previous versions of Windows.
PowerShell (Admin).
- Disable the Windows Recovery Environment.
- We're now going to create a bigger WinRE partition, select the correct physical disk and partition.
- Delete the selected WinRE partition and list the remaining partitions to confirm that the correct partition has been erased, now select your
C:\
drive (where your OS is installed).
- Press
Win
+R
to open the "Run dialog", typediskmgmt.msc
and pressENTER
. Right click yourC:\
drive and shrink it so that there is 2048MB unallocated at the end of the SSD, now come back to here to this guide and continue. - Create a new partition at the end of the SSD with this
ID
andGPT attributes
, these are correct for the recovery partition and must be set EXACTLY the same as in these commands below.
- List all volumes to ensure the
Windows RE tools
partition has been created sucessfully, now exit diskpart.
- Run the command below, if it fails you have the same issue as me so continue reading. If it completed sucessfully without any errors you're done! :D
- The issue I had is my
WinRE.wim
file was missing, I had to extract this from my Windows installation media, follow along if you had the same issue, if not you can finish here on this block of commands.
Continue only if the reagentc /enable
command failed!
- Download Windows 10 installation media and copy
install.wim
from theinstallation-media:\sources\
folder toC:\Images\install.wim
. Also create the directoryC:\Mount
. - Get required information from
install.wim
.
- I am running
Windows 10 IoT Enterprise LTSC 21H2
which is binary identical toWindows 10 Enterprise LTSC
so I can use the first image (Index: 1
). - Mount the correct image to
C:\Mount
, make sure you choose the correct index with/index:1
.
- Prepare the recovery folder.
- Copy the recovery image to the desktop from the mounted installation media.
- Assign the letter
R:\
to the recovery partition so that it can be written to.
- Create the
\Recovery\WindowsRE
folder in the recovery partition and prepare the partition with the correct attributes.
- Now we're going to transfer the
WinRE.wim
image from your desktop toR:\Recovery\WindowsRE\
.
- Enable the WinRE image and check that it has correctly enabled.
- Unmount the recovery partition so that it doesn't show up in File Explorer
- Confirm once more that the drive letter has actually been removed by typing the same command again:
- You're DONE, now run Windows Update and hope that it works xD!