it seems MS is beginning to offer 1903 to some 1809 users.
Given that this has happened once, then you might expect it to keep happening- failed upgrades just keep repeating. Which = a huge download each time- annoying behavior.
Error numbers are not precisely diagnostic, unfortunately. Here's a random sample from searching for that error number (have you tried?)
Fix "0x80070643" Windows Update or Installation Errors on Windows - Driver Easy
Whether the first idea helps or not or is relevant in your case is entirely questionable.
Now, you will want to stop repeating upgrade attempts. You don't say if you have Home or Pro. Pro users can defer feature updates. I will assume Home.
One tool to help here is
WUMT/Sledgehammer (free)
Download Sledgehammer (formerly WUMT Wrapper Script) - MajorGeeks
Blocks Windows Update, allows manual scan and selective updates with check boxes.
Using that, you can stay with 1809 in a controlled manner.
You may have some log files about the failed upgrade attempt:
https://support.microsoft.com/en-gb/...sion-of-window
- see the relevant section.
However, it can be very hard to get useful info from them.
If you want to upgrade: try these basic checks:
- check your disk e.g. HD Tune (free) Health and Error scan tabs
- If ok- run
chkdsk c: /scan
from an admin command or Powershell prompt (checks only)
- check you have at least 30Gb free on C:
Post a full screen screenshot of your partitions using e.g. Minitoll partition wizard (not disk Management) expanding columns as necessary so text is visible.
If all is ok:
Prepare to manually upgrade to 1903 by downloading the iso using the Microsoft Media Creation tool
https://www.microsoft.com/en-gb/soft...load/windows10
and then upgrade:
Disconnect any unnecessary peripherals
Disable or uninstall any 3
rd party security software- especially Comodo. Noted you have Emsisoft.
Uninstall anything that modifies the GUI.
Log in, rt click and Mount the 1903 iso file
Open the new drive in file explorer
Run setup.exe
During the sequence choose NOT to accept updates (you can disconnect the internet).
This shortens the sequence and reduces the risk of failure.
Note any error message exactly.
Zip and upload log files:
https://support.microsoft.com/en-gb/help/928901/log-files-that-are-created-when-you-upgrade-to-a-new-version-of-window
- see the relevant section.