Microsoft confirme la préconisation de désinstallation de 4 des Mises à jour d’Aout:

• KB2982791
• KB2970228
• KB2975719
• KB2975331

Si vous les avez installées,  désinstallez les!!! Mais si vous rencontrez les problèmes décrits ce dessous, bon courage, la solution de contournement et de réparation est quelque peu complexe et sans garantie.

Moralité, il vaut mieux attendre un mois pour appliquer les MAJ et vérifier qu’aucune ne casse quoi que ce soit

• Known issue 1
  After you install this security update, fonts that are installed in a location other than the default fonts directory (%windir%\fonts\) cannot be changed when they are loaded into any active session. Attempts to change, replace, or delete these fonts will be blocked, and a « File in use » message will be presented.
  For more information, go to the following Microsoft webpages:

  Font Installation and Deletion

  (http://msdn.microsoft.com/en-us/library/dd144833(v=vs.85).aspx)

  AddFontResource function

  (http://msdn.microsoft.com/en-us/library/dd183326(v=vs.85).aspx)

  AddFontResourceEx function

  (http://msdn.microsoft.com/en-us/library/dd183327(v=vs.85).aspx)

  RemoveFontResource function

  (http://msdn.microsoft.com/en-us/library/dd162922(v=vs.85).aspx)

  RemoveFontResourceEx function

  (http://msdn.microsoft.com/en-us/library/dd162923(v=vs.85).aspx)

• Known issue 2
  Microsoft is investigating behavior in which fonts do not render correctly after any of the following updates are installed:

  2982791

  (http://support.microsoft.com/kb/2982791/ )

  MS14-045: Description of the security update for kernel-mode drivers: August 12, 2014
  2970228

  (http://support.microsoft.com/kb/2970228/ )

  Update to support the new currency symbol for the Russian ruble in Windows
  2975719

  (http://support.microsoft.com/kb/2975719/ )

  August 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2
  2975331

  (http://support.microsoft.com/kb/2975331/ )

  August 2014 update rollup for Windows RT, Windows 8, and Windows Server 2012

  Status
  Microsoft has removed the download links to these updates while these issues are being investigated.
  Mitigations
  Open the Programs and Features item in Control Panel, and then click View installed updates. Find and then uninstall any of the following update that are currently installed:

  • KB2982791
  • KB2970228
  • KB2975719
  • KB2975331
• Known issue 3
  Microsoft is investigating behavior in which systems may crash with a 0x50 Stop error message (bugcheck) after any of the following updates are installed:

  2982791

  (http://support.microsoft.com/kb/2982791/ )

  MS14-045: Description of the security update for kernel-mode drivers: August 12, 2014
  2970228

  (http://support.microsoft.com/kb/2970228/ )

  Update to support the new currency symbol for the Russian ruble in Windows
  2975719

  (http://support.microsoft.com/kb/2975719/ )

  August 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2
  2975331

  (http://support.microsoft.com/kb/2975331/ )

  August 2014 update rollup for Windows RT, Windows 8, and Windows Server 2012

  This condition may be persistent and may prevent the system from starting correctly.
  Status
  Microsoft has removed the download links to these updates while these issues are being investigated.
  Mitigations

  1. Restart the computer in safe mode:
     • Windows 7

       (http://windows.microsoft.com/en-us/windows/start-computer-safe-mode#start-computer-safe-mode=windows-7)

     • Windows 8 and Windows 8.1:
       1. If you have installation media for Windows 8.1 (such as a DVD or USB), start your computer by using the installation media. Insert the DVD or USB flash drive, and restart the computer. If you see a message that asks you to « Press any key to boot from DVD, » do this. If you do not receive the message, you may have to change the restart order in your computer’s BIOS settings so that the computer first starts to the DVD or USB. When you reach the Install Windows page, you should click Repair your computer to start the Windows Recovery Environment.
       2. If you do not have media, you should use the power button to restart your computer during the startup process three times. This should start the Windows Recovery Environment. 
       3. As soon as your computer starts in the Windows Recovery Environment, tap or click Troubleshoot on the Choose an option screen. If you do not see the Startup Settings option, tap or click Advanced options.
       4. Tap or click Startup Settings., and then tap or click Restart.
       5. On the Startup Settings screen, select the startup setting that you want. (Press 4 for safe mode.) 
       6. Sign in to your computer by using a user account that has administrator rights.
  2. Delete the fntcache.dat file. To do this, type the following command at command prompt

     (http://windows.microsoft.com/en-us/windows/command-prompt-faq#1TC=windows-7)

     , and then press Enter:

     del %windir%\system32\fntcache.dat

  3. After you delete fntcache.dat, restart the computer. The computer should now start successfully.
  4. Click Start, click Run, type regedit in the Open box, and then click OK.
  5. Locate and then click the following subkey in the registry:

     HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Fonts\

  6. Right-click the Fonts registry subkey, and then click Export.
  7. Type a name for the exported reg file, and select a location to store the file. You will use this file later to restore the font registration that you will remove in the following steps. 
  8. After you save the reg file, find any registry values under the Fonts registry subkey for which the data field meets the following criteria:
     • Contains a full file path (not just a file name)
     • The full file path ends in an « .otf » extension. (This indicates an OpenType font file.) 

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  9. Delete the fntcache.dat file again. (It will have been re-created.) To do this, type the following command at command prompt, and then press Enter:

     del %windir%\system32\fntcache.dat

  10. Open the Programs and Features item in Control Panel, and then click View installed updates. Find and then uninstall any of the following update that are currently installed:
      • KB2982791
      • KB2970228
      • KB2975719
      • KB2975331
  11. Restart the computer. 
  12. Find the reg file that you saved earlier, right-click the file, and then click Merge to restore the font registry values that you previously removed.
      Note It’s safe to re-add these registry values now that the offending updates have been removed.