Install the latest available version of the following drivers/utilities:
- ATKACPI driver and hotkey-related utilities (V1.0.0030)
ATK ACPI is ASUS tool key of Advanced Configuration and Power Interface.
It's the driver to make BIOS and OS communicate with each other to manage the power configuration.
Source: What's the function of the driver ATK ACPI?
- Keyboard Device Filter Utility (V22.214.171.124)
Adds additional features to standard keyboard functions such as enabling multiple key combinations.
Source: Asus Utility and Bloatware Guide
- ASUS InstantKey Utility (V1.1.3)
ASUS-branded programs include the Instant Key utility, which lets you assign one of 10 specific commands to the Instant Key, such as Mute, launching the Web browser, or a specific app.
Source: ASUS N56VZ-DS71 Review
ExpressCache software, when combined with a small SanDisk SSD, will provide significant boot up and application performance increases.
A high-performance SanDisk SSD drive serves as that flash-based cache, while ExpressCache manages the data across the SSD and the HDD.
Source: ExpressCache Software from SanDisk
If you would like to upgrade your OS from Win 8 to Win 8.1, please upgrade to ExpressCache version 1.0.100 or above and follow below steps to update ExpressCache:
- Uninstall older version of Express Cache before upgrade.
- Download and install newer version of Express Cache.
- Reboot your system.
Source: ASUSTeK Computer Inc. -Support- Drivers and Download ExpressCache
Note While ExpressCache has nothing to do with the keyboard, ASUS recommends to install latest version when upgrading from Windows 8 to Windows 8.1.
You can get all of them from the official support page by selecting Windows 8 (yes, not Windows 8.1) as operating system.