Microsoft Offers Two Windows 8.1 Update install Fixes
 

Tried installing Windows 8.1.1 but having problems getting past the error messages? Well, you are not alone and Microsoft has already issued two patches to help with the installation, but meeting with mixed success. If all else fails, there are always the third party solutions. Microsoft has already announced that Windows 8.1 users are required to get the Windows 8.1 Update, or they won't be able to receive any further updates for the OS.

http://www.hardocp.com/news/2014/04/...stall_fix es/