Windows update KB2919355 fails to install - Error code 800F0922

No problem! Here are the steps I used to extend my System Reserved partition and successfully install the update.

1. I first selected my main partition (C:) and clicked Move/Resize then subtracted 650MB from the main partition to leave about 650MB in Unallocated Space as shown in the picture below. 650MB may not be necessary, I only chose this amount so that my System Reserved Partition would have an even 1GB of space.
2. I then selected the System Reserved Partition and clicked Move/Resize again and increased the size by 650MB until there was no Unallocated Space remaining and the size of the drive was about 1GB.
3. You will need to click the Apply button (grayed out in the screenshot) after completing these actions and your computer will restart so that the drive will be free for operations.
4. I was then able to install the update without any problem. Hope this helps someone else too! Please mark this as the answer if it helps you!

I was able to install KB2919355 after 8000F0922 error. But in my case there were no problems with system reserved partition. It turned out, installer could not execute "netcfg" command. Root cause was a Cisco VPN client. When I deleted VPN client, update installed normally.

Hey George, I'm not sure if you figured out a solution yet, but using some information toward the end of this thread, I was able to solve the problem by extending my System Reserved Partition, which was entirely full. I used MiniTool Partition Wizard, shrunk my C: drive, then extended the System Reserved drive, and it worked perfectly!

Could you please explain what exactly I'm supposed to click? I've never used MiniTool's partitioner, so I need some help.

By "System Reserved Partition" do you mean the partition labeled "GPT (Reserved Partition)" or something else?

What do I click exactly? Please help. Thank you.

Hey George, I'm not sure if you figured out a solution yet, but using some information toward the end of this thread, I was able to solve the problem by extending my System Reserved Partition, which was entirely full. I used MiniTool Partition Wizard, shrunk my C: drive, then extended the System Reserved drive, and it worked perfectly!

2014-04-13 21:57:12, Error                 CSI    0000042c (F) Done with generic command 2; CreateProcess returned 0, CPAW returned S_OK

    Process exit code 255 (0x000000ff) resulted in success? FALSE

    Process output: [l:0 ][gle=0x80004005]

2014-04-13 21:57:12, Error      [0x018007] CSI    0000042d (F) Failed execution of queue item Installer: **Generic Command ({81a34a10-4256-436a-89d6-794b97ca407c}) with HRESULT HRESULT_FROM_WIN32(14109).**Failure will not be ignored: A rollback will be initiated after all the operations in the installer queue are completed; installer is reliable (2)[gle=0x80004005]

2014-04-13 21:57:12, Info                  CBS    Added C:\WINDOWS\Logs\CBS\CBS.log to WER report.

2014-04-13 21:57:12, Info                  CBS    Added C:\WINDOWS\Logs\CBS\CbsPersist_20140413103359.log to WER report.

2014-04-13 21:57:12, Info                  CBS    Added C:\WINDOWS\Logs\CBS\CbsPersist_20140413084805.cab to WER report.

2014-04-13 21:57:12, Info                  CBS    Added C:\WINDOWS\Logs\CBS\CbsPersist_20140413073624.cab to WER report.

2014-04-13 21:57:12, Info                  CBS    Added C:\WINDOWS\Logs\CBS\CbsPersist_20140413055104.cab to WER report.

2014-04-13 21:57:12, Info                  CBS    Added C:\WINDOWS\Logs\CBS\CbsPersist_20140413035512.cab to WER report.

2014-04-13 21:57:12, Info                  CBS    Could not get active session for current session file logging [HRESULT = 0x80004003 - E_POINTER]

2014-04-13 21:57:12, Info                  CBS    Not able to add pending.xml.bad to Windows Error Report. [HRESULT = 0x80070002 - ERROR_FILE_NOT_FOUND]

2014-04-13 21:57:12, Info                  CBS    Not able to add SCM.EVM to Windows Error Report. [HRESULT = 0x80070002 - ERROR_FILE_NOT_FOUND]

2014-04-13 21:57:12, Info                  CSI    0000042f End executing advanced installer (sequence 962)

    Completion status: HRESULT_FROM_WIN32(ERROR_ADVANCED_INSTALLER_FAILED)

and I got this right before the rollback:

2014-04-13 21:57:39, Info                  CBS    Progress: UI message updated. Operation type: Update. Stage: 1 out of 1. Percent progress: 99.

2014-04-13 21:57:39, Info                  CBS    Winlogon: TiCoreOnCreateSession has been called

2014-04-13 21:57:45, Error                 CBS    Startup: Failed to process advanced operation queue, startupPhase: 0.  A rollback transaction will be created. [HRESULT = 0x800f0922 - CBS_E_INSTALLERS_FAILED]

2014-04-13 21:57:45, Info                  CBS    Setting ExecuteState key to: CbsExecuteStateInitiateRollback | CbsExecuteStateFlagAdvancedInstallersFailed

When I googled the results I found that it was related to a .NET framework 3.0 installation back in the days of Win7 SP1, some were IIS related ! It could be possible since this is an upgraded machine  with Windows 7 originally installed. I feel somehow doomed for having to have a clean Windows 8.1 install? Any help before I do that?