MS15-111: Description of the security update for Windows Kernel: October 13, 2015

• All future security and nonsecurity updates for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 require update 2919355 to be installed. We recommend that you install update 2919355 on your Windows RT 8.1-based, Windows 8.1-based, or Windows Server 2012 R2-based computer so that you receive future updates.
• If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.
  

Known issues in this security update

• After you install this security update, on certain Lenovo-based computers, you may receive an error message on a blue screen that resembles the following:
  
  Your PC ran into a problem and needs to restart. We're just collecting some error information and then you can restart.
  
  Lenovo has confirmed that this is a problem in the Lenovo USB Blocker application version 1.0.0.37. Lenovo USB Blocker application version 1.0.0.62 does not have this issue. Please contact Lenovo to download this updated version of the application.
  
  For more information, click the following article number to view the article in the Microsoft Knowledge Base:
  
  3107998 Remove Lenovo USB Blocker version 1.0.0.37 to avoid a system crash
  
  The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.