MS Needs Your Help with 8.1 Update Blue Screens
 

Microsoft is looking for a solution to the issue plaguing users upgrading to Windows 8.1. The mystery bug will roll the installation back to a blue screen, halting the upgrade installation. After weeks of unsuccessful testing, Microsoft is turning to its user base for a solution. Because after two weeks of trying, Microsoft still hasn't figured out what's causing the problem, and your input may help.

http://www.hardocp.com/news/2013/11/..._blue_screens/