Error: 0x800F0922 when installing KB 2919355

how much should be the System Reserved Partition. Mine is 500 mb. do you think its insufficient?

I do not use VPN.

please help.

this issue is since I purchased the system which is Dell  Inspiron laptop.

TIA

If you don't use bitlocker, simply delete the System Reserved partition, as it's not needed.

You will have to do a few things prior to doing so:

1. Move boot files from the system reserved partition to the system partition
   1. Open admin command prompt:
      • *bcdboot C:\Windows /s C:*
      • diskpart
      • lis vol
      • select vol<System Volume>
      • act
      • lis vol
      • sel vol<System Reserved Volume>
      • inactive
      • exit
   2. Configure BCD:
      • bcdedit /set {bootmgr} device partition=C:
      • bcdedit /set {default} device partition=C:
      • bcdedit /set {default} osdevice partition=C:
   3. Before rebooting, please make sure you have either a Windows installation DVD or WinPE/WinRE cd/usb flash drive to boot from if Windows fails to boot. If Windows doesn't boot, boot from install disk or WinPE/WinRE and at the command prompt type:
      • bootrec /fixmbr
      • bootrec /fixboot
      • bootrec /rebuildbcd

Once rebooted, move WinRE from the system reserved partition to the system partition

1. Open admin command prompt
2. Assign a drive letter to the recovery partition in diskpart:
   • diskpart
   • lis vol
   • sel vol<Recovery Volume>
   • assign let=R
3. Disable WinRE**:**
   • reagentc /disable
4. Remove WinRE from Reserved partition:
   • rd R:\Recovery
5. Copy WinRE to System partition:
   • robocopy C:\Windows\System32\Recovery\ R:\Recovery\WindowsRE\ WinRE.wim /copyall /dcopy:t
6. Configure WinRE:
   • reagentc /setreimage /path C:\Recovery\WindowsRE
7. Enable WinRE:
   • reagentc /enable

Depending on your available space on your hard drive, you may find it useful to create a new partition at the end of the drive (after the OS partition) and store WinRE and, depending on size, an OSI folder (Original System Installation) which contains all files contained within the Windows 8.1 ISO or DVD.  If you choose to, it's important when you create the Recovery partition that you set the partition ID flag to 27 (0x27) using diskpart, as that designates it as a Recovery Partition.

For example. I have a 250GB recovery partition that houses WinRE, OSI, and a recovery wim of my system with all desktop applications installed.  I've also edited the BCD to display the the 3 boot options (Windows 8.1, WinRE, Win 8.1 OSI) prior to booting Windows, as this allows a recovery of the OS if for some reason WinRE won't boot.

After a lot of research, everything failed before, manual install, removing symantec, DSIM tools, making more space to drive C. etc.

This one worked for me!!

Remove this registry keys

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WINEVT\Publishers{e7ef96be-969f-414f-97d7-3ddb7b558ccc}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WINEVT\Publishers{8c416c79-d49b-4f01-a467-e56d3aa8234c}

I got this info from Here, hopefully works for somebody else

https://social.technet.microsoft.com/Forums/windows/en-US/70219bcb-36a8-466e-900b-cbf390db38d2/failure-configuring-windows-updates-reverting-changes-postreboot-status-0x800f0922?forum=winserver8gen