Download Windows 8.1 Update for x64-based Systems (KB2919355) from Official Microsoft Download Center

A Surface Pro

Surface Pro

The most versatile laptop

Windows 8.1 Update for x64-based Systems (KB2919355)

Important! Selecting a language below will dynamically change the complete page content to that language.

Select Language:
Windows 8.1 Update is a cumulative set of security updates, critical updates and updates.