New Post: Adobe FlashPlayer 12.0.0.77 out of the catalog doesn't install - HELP!

Relevant WindowsUpdate.log entries:

2014-03-25  10:25:50:253    1172    4bc Agent   *************
2014-03-25  10:25:50:253    1172    4bc Agent   ** START **  Agent: Installing updates [CallerId = AutomaticUpdatesWuApp]
2014-03-25  10:25:50:253    1172    4bc Agent   *********
2014-03-25  10:25:50:253    1172    4bc Agent     * Updates to install = 1
2014-03-25  10:25:50:257    1172    4bc Agent     *   Title = Adobe Flash Player 32-bit/64-bit ActiveX 12.0.0.77
2014-03-25  10:25:50:257    1172    4bc Agent     *   UpdateId = {7FD7DFEF-C83F-4B17-914F-F2CC362C194B}.1
2014-03-25  10:25:50:299    1172    4bc DnldMgr Preparing update for install, updateId = {7FD7DFEF-C83F-4B17-914F-F2CC362C194B}.1.
2014-03-25  10:25:50:300    9128    117c    Misc    ===========  Logging initialized (build: 7.9.9600.16422, tz: +1100)  ===========
2014-03-25  10:25:50:300    9128    117c    Misc      = Process: C:\WINDOWS\system32\wuauclt.exe
2014-03-25  10:25:50:300    9128    117c    Misc      = Module: C:\WINDOWS\SYSTEM32\wuaueng.dll
2014-03-25  10:25:50:300    9128    117c    Handler :::::::::::::
2014-03-25  10:25:50:300    9128    117c    Handler :: START ::  Handler: MSI Install
2014-03-25  10:25:50:300    9128    117c    Handler :::::::::
2014-03-25  10:25:50:300    9128    117c    Handler   : Updates to install = 1
2014-03-25  10:25:50:302    9128    117c    Handler MSI update {7FD7DFEF-C83F-4B17-914F-F2CC362C194B}.1 using source image from 1 CABs.
2014-03-25  10:25:50:536    9128    117c    Handler   : Batch installing 1 updates
2014-03-25  10:25:50:537    9128    117c    Handler List of MSPs in transaction:
2014-03-25  10:25:50:537    9128    117c    Handler List of Transforms in transaction:
2014-03-25  10:25:50:537    9128    117c    Handler MSI final command line:  ALLUSERS=1 MSIRESTARTMANAGERCONTROL=Disable REBOOT=REALLYSUPPRESS
2014-03-25  10:25:54:147    1172    3c4 Report  REPORT EVENT: {ADD81270-D52B-463C-8F0F-ABF3482E2256}    2014-03-25 10:25:49:147+1100    1   162 [AGENT_DOWNLOAD_SUCCEEDED]  101 {7FD7DFEF-C83F-4B17-914F-F2CC362C194B}  1   0   AutomaticUpdatesWuApp   Success Content Download    Download succeeded.
2014-03-25  10:25:54:147    1172    3c4 Report  REPORT EVENT: {B1E9935E-C9F5-47A6-8870-8F838991034F}    2014-03-25 10:25:49:147+1100    1   189 [AU_UNSCHEDULED_INSTALL_READY]  102 {00000000-0000-0000-0000-000000000000}  0   0   AutomaticUpdates    Success Content Install Installation Ready: The following updates are downloaded and ready for installation. To install the updates, an administrator should log on to this computer and Windows will prompt with further instructions:  - Adobe Shockwave Player 12.0 - Google Chrome 33.0.1750.154 - Microsoft Visual Studio 2010 Service Pack 1 - Adobe Flash Player 32-bit/64-bit ActiveX 12.0.0.77
2014-03-25  10:25:54:147    1172    3c4 Report  CWERReporter finishing event handling. (00000000)
2014-03-25  10:26:11:242    9128    117c    Handler MSP Error List:
2014-03-25  10:26:11:242    9128    117c    Handler 1: 1722 2: NewCustomAction1 3: C:\WINDOWS\TEMP\InstallAX_12_0_0_77.exe 4: -install -msi 
2014-03-25  10:26:11:242    9128    117c    Handler   : MSI transaction completed. MSI: 0x80070643, Handler: 0x8024200b, Source: No, Reboot: 0
2014-03-25  10:26:11:242    9128    117c    Handler Updating status for update 0.
2014-03-25  10:26:11:242    9128    117c    Handler   : WARNING: First failure for update {7FD7DFEF-C83F-4B17-914F-F2CC362C194B}, transaction error = 0x8024200b, MSI result = 0x80070643, MSI action = NewCustomAction1
2014-03-25  10:26:11:243    9128    117c    Handler Sending completion notification for update 0 ({7FD7DFEF-C83F-4B17-914F-F2CC362C194B}.1).
2014-03-25  10:26:11:243    9128    117c    Handler Stopping on first error due to FailOptTerminate.
2014-03-25  10:26:11:243    9128    117c    Handler   : WARNING: Operation failed at update 0, Exit code = 0x8024200B
2014-03-25  10:26:11:243    9128    117c    Handler :::::::::
2014-03-25  10:26:11:243    1172    16b4    AU  >>##  RESUMED  ## AU: Installing update [UpdateId = {7FD7DFEF-C83F-4B17-914F-F2CC362C194B}]
2014-03-25  10:26:11:243    9128    117c    Handler ::  END  ::  Handler: MSI Install
2014-03-25  10:26:11:243    1172    16b4    AU    # WARNING: Install failed, error = 0x80070643 / 0x000006BA
2014-03-25  10:26:11:243    9128    117c    Handler :::::::::::::
2014-03-25  10:26:11:252    1172    4bc Agent   *********
2014-03-25  10:26:11:252    1172    4bc Agent   **  END  **  Agent: Installing updates [CallerId = AutomaticUpdatesWuApp]
2014-03-25  10:26:11:252    1172    4bc Agent   *************

Edit
C:\WINDOWS\TEMP\InstallAX_12_0_0_77.exe is created during the update installation process, but vanishes when the update fails so I don't believe it's a permissions issue.