Infoworld (earlier news article)
Microsoft pulls crippling patch from Windows Update
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 MS14-045: Description of the security update for kernel-mode drivers: August 12, 2014
2970228 Update to support the new currency symbol for the Russian ruble in Windows
2975719 August 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2
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.
Microsoft has removed the download links to these updates while these issues are being investigated.