KB3172988 Cumulative update for Windows 10 Version 1511.
Windows 10 Version 1511 Build number after the Cumulative update KB3172988 goes to 10586,499.
This update includes improvements and fixes to enhance the functionality of Windows 10 Version 1511.
Windows 10 updates are cumulative. Therefore, this package contains all previously released fixes.
If you have installed previous updates, only the new fixes that are contained in this package will be downloaded and installed to your computer. If you’re installing a Windows 10 update package for the first time, the package for the x86 version is 503 MB and the package for the x64 version is 905 MB.
No further information available at the moment.