Windows 8.1 Update – important refinements to the Windows experience
- Win8.1 Update KB2919355 is a 400 to 700 MB (or higher!) download;
- Prerequisites include KB2919442;
- KB2919355 will be offered via Windows Update, not the Windows Store;
- All security and non-security updates released on or after 13 May 2014 for Win8.1, WinRT 8.1 & Surface (Pro) 2 will require KB2919355 to be installed.