How to install Win8.1 Update RTM?

The installation method of this update is described below. As you can see, there are four downloadable update packages, including three functional patches and one maintenance patch. The installation of the patch is sequential. Please double-click the following serial number to install this update in sequence:
•KB2919442
•KB2919355
•KB2932046
•KB2937592
Installation Every update requires a restart of the computer. If you install the next patch directly without starting your computer, it may cause the system to fail to start.
The patch package KB2919355 is the main update package for this update. Depending on the speed of your hard drive, it will take about 30 minutes to install this update. In the meantime, please leave at least 2G of additional temporary hard disk space (32-bit) for your system partition.
The following is the system version information after the update:

▲System version in the registry editor after the update

▲“System information displayed in the system information

▲The version number of Internet Explorer has been upgraded to 11.0.7