Microsoft quietly recommended users uninstall the most recent security updates (8/12/2014) after reports began to surface that these updates were causing the dreaded Blue Screen of Death.

Here is more information:

http://www.tomshardware.com/news/microsoft-update-patch-bsod-0x50-stop-error,27481.html

http://threatpost.com/microsoft-yet-to-deliver-fix-for-faulty-patch-tuesday-update

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