In late August, Microsoft released the RTM version of Windows 8.1 to OEM partners so that manufacturers can carry out tests on their products that will be on sale from October 18th.

In these past two months, the Redmond team has kept continuing development work to optimize the code and fix some bugs. And, a post RTM update called “GA Rollup A” has been completed, which will be available on Windows Update alongside with Windows 8.1 RTM.

The term “RTM” usually stands for the final version of software, which is the “gold copy” or “gold bits.” And, the fact is “A perfect software is a myth.” Although, Windows 8.1 RTM was finished two months ago, but the developers used the interval between RTM and the GA (General Availability) date and continued to improve the user experience to provide greater quality of the operating system.

The GA Rollup A update aka Quick Fix Engineering (QFE) will be distributed to end users via Windows Update. The update package has been completed in late September, so GA Rollup B is also conceivable sometime in November.

The size of the rollup update weighs approximately 232.1 MB for 64-bit Windows 8.1, and around 130.8MB and 127.75MB for 32-bit Windows 8.1 and Windows 8.1 RT, respectively.

Internet Explorer 11

After installation, Windows 8.1 will look same as earlier except few changes. In Internet Explorer 11, an app bar is added on the bottom of the screen, similar to that present in the new Mail app. Aside, after analyzing the versions of the files, it’s turned out that Microsoft has updated practically all the components, including the kernel.

Kernel32.dll GA Rollup A

Recently, the GA Rollup A for all edition of Windows 8.1 has already been leaked on P2P networks. The package includes three patches: KB2883200, KB2894029 and KB2894179, which will be available officially on Windows Update on October 18.

Just two day remains before the debut of Windows 8.1, it’s advised to wait for the update from the official source.