To install the KB2999226 there are prerequisites.

Prerequisites
To install this update, you must have April 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) installed in Windows 8.1 or Windows Server 2012 R2. Or, install Service Pack 1 for Windows 7 or Windows Server 2008 R2. Or, install Service Pack 2 for Windows Vista and for Windows Server 2008.

I also dont know if I have this 2919355 done.

Should I do that one then the first one?
It wont do any harm if I already have them?