The windows 10 fall upgrade 1709 fails after about 45% mark.. Then gives an error message and returns system to 1703

 I am stuck!

Have you looked at your logs yet?

Here's an example of what you might see.  I have had to revise my PowerShell script to try to take account of users' unsortable timestamp formats.

https://answers.microsoft.com/en-us/insider/forum/insider_wintp-insider_update-insiderplat_pc/unable-to-find-working-solution-to-0xc1900101/e848fee6-b047-4aba-a651-623d95e6678f#LastReply

<quote>

cd \

$This_Hour = Get-Date -Hour ((Get-Date).Hour -1)  -Format "yyyy-MM-dd HH:MM:ss"

LS -Re -Fi * -Fo -EA:SilentlyContinue | where LastWriteTime -GE ($This_Hour) | sort LastWriteTime | ft LastWriteTime, Length, FullName  -AutoSize -Wrap

That does speed up the output phase but it is still slow because it has to list every file on the drive and then compare the timestamp in the filter.

</quote>

After wasting days on this, to no avail, I figured that it would actually be less hassle to do a clean install.

I backed up everything, (including Sticky Notes!) and went for it.

Success!

Reloaded all my Files, Apps and Programmes, spent a short while customising things back as they were, and Hey Presto!

Shouldn't have had to resort to this method but at least it worked and I can sop wasting anymore time.

It would have been quicker in the long run to have done this first, but I hate being defeated!

Final Score:

Microsoft  1

Me  0

Thanks to all who have tried to help. And good luck

I am happy that this path worked for you.... 

My problem with this path is that I have some software ..  I would need to repurchase as their licence is one use...   I would need to invest at least $300 to reinstall the windows...  So I am stuck!

After wasting days on this, to no avail, I figured that it would actually be less hassle to do a clean install.

I backed up everything, (including Sticky Notes!) and went for it.

Success!

Reloaded all my Files, Apps and Programmes, spent a short while customising things back as they were, and Hey Presto!

Shouldn't have had to resort to this method but at least it worked and I can sop wasting anymore time.

It would have been quicker in the long run to have done this first, but I hate being defeated!

Final Score:

Microsoft  1

Me  0

Thanks to all who have tried to help. And good luck

Using one drive or drop box post share links into the thread for any of the Panther files.

I do not have one drive or drop box...  I worry about putting this much information on a public drive..

You do have OneDrive.   This is good help.  You could start with  setupact.log  and  setupAPI.dev.log   (or browse them yourself.)

C.f.  (an example from an Insider upgrade)

https://answers.microsoft.com/en-us/insider/forum/insider_wintp-insider_update-insiderplat_pc/cannot-update-to-latest-insider-preview/7f47e6ca-bdd1-4381-bc9d-86dbfc45c4cc?page=1#LastReply

There will also be similar logs available from standard Windows Cumulative updates.  They just aren't as obvious or as well documented.

Ref.

https://docs.microsoft.com/en-us/windows/deployment/upgrade/resolve-windows-10-upgrade-errors#0xc1900101

FYI

Robert Aldwinckle

Same problem here, Lenovo G500 i3. All drivers are up to date, disabled antivirus, VPNs, network drivers, Graphic Card drivers, Blutooth drivers. Tried all methods for upgrade, followed all recommendations posted in different forums. Did a full test on Hardware components. Still No success. Fails at 45% with samelogs and errors posted here. Why Microsoft does not simply posts a tool to tell us which Driver is cusing the issue?

One work around, which stops the rebooting..  is the  option in the advanced options of the windows update panel..  You can defer feature updates...  If you pick a big number It will stop trying to put in 1709.. and will just patch 1703... 

This is not a permanent fix... as we need to do the 1709 and beyond updates..

I still have some hope that finally Microsoft will do something to help us out...