Error 0x800f0922 for 2020-01 Cumulative Update for Windows 10 Version 1909 for x64-based Systems (KB4532695)

Here is the information from DiskPart.  I don't know if it matters or not, but the type for the system partition is listed as primary instead of system under the partition list.

When you look at it in Disk Management, the drive (F:) lists both primary and system.

Microsoft Windows [Version 10.0.16299.309]
(c) 2017 Microsoft Corporation. All rights reserved.

C:\WINDOWS\system32>DiskPart

Microsoft DiskPart version 10.0.16299.15

Copyright (C) Microsoft Corporation.
On computer: JOHN-TOWER-PC

DISKPART> Select Disk 0

Disk 0 is now the selected disk.

DISKPART> List Part

  Partition ###  Type              Size     Offset
  -------------  ----------------  -------  -------
  Partition 1    Recovery           300 MB  1024 KB
  Partition 2    System              99 MB   301 MB
  Partition 3    Reserved           128 MB   400 MB
  Partition 4    Primary            231 GB   528 MB
  Partition 5    Recovery           450 MB   232 GB

DISKPART> Select Part 2

Partition 2 is now the selected partition.

DISKPART> Detail Part

Partition 2
Type    : c12a7328-f81f-11d2-ba4b-00a0c93ec93b
Hidden  : Yes
Required: No
Attrib  : 0X8000000000000000
Offset in Bytes: 315621376

  Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
  ----------  ---  -----------  -----  ----------  -------  ---------  --------
* Volume 2                      FAT32  Partition     99 MB  Healthy    System

DISKPART>

You are welcome. Really glad to hear it. Good going. Good luck, & keep us informed.

Thanks for all your help, but i reinstalled windows today, and now everything is fixed

(1) So now DiskPart does agree that your Windows partitions & Ubuntu are on Disk 0. That's great. Sadly, the positions of partitions 4 & 5 are still switched on the disk. That doesn't seem natural to me. And within the BCD it is saying the Recovery partition (Shift+Restart goes there) is on Partition 5...

Geräteoptionen

Bezeichner             {ae3879e4-fb7f-11ea-bd25-7085c25d426a}

description             Windows Recovery

ramdisksdidevice   partition=\Device\HarddiskVolume5         <<<Partition 5

ramdisksdipath      \Recovery\WindowsRE\boot.sdi

That's its correct position on Disk 0, but it everywhere else is known as ...4. Even ReagentC calls it 4.

(2) I like seeing {bootmgr} on top here...

Start-Manager für Firmware

Bezeichner       {fwbootmgr}

displayorder    {bootmgr}                                                            <<<Windows Boot Manager

                        {bc3fa510-fe92-11ea-b227-806e6f6e6963}        <<<Direct to Ubuntu

                        {bc3fa50f-fe92-11ea-b227-806e6f6e6963}         <<<Direct to Ubuntu (same one I guess)

                        {7c737fc1-dbb4-11ea-8708-836fcd478fb1}        <<<Direct to "Hard Drive"

timeout           1

I think Windows likes that when it needs to do a reboot. It wants {Bootmgr} to determine which OS to boot. Unfortunately, there is no boot loader entry for Ubuntu; so, that never will be a choice. You can only direct-boot to Ubuntu. I don't know why you've got two entries for Ubuntu when I see only one partition -- weird partition 5.

(3) What happens when you boot to Ubuntu? Is there an uninstall procedure for it? Looks like it's put a folder into EFI...

Firmwareanwendung (101fffff)

Bezeichner         {bc3fa50f-fe92-11ea-b227-806e6f6e6963}

device                partition=\Device\HarddiskVolume1

path                   \EFI\UBUNTU\SHIMX64.EFI                 <<<Ubuntu boot loader on EFI

description        ubuntu

I think I would uninstall it, delete partition 5, then reinstall it if still wanted.