With the build 9926, Microsoft has made available Cortana for Windows 10 Technical Preview users (in U.S only), she lets you search the web and for files, apps and settings on your computer (Win10). You need to sign into Microsoft account to turn it on. The search box/search icon needs to be visible on the taskbar for you to use the Personal assistant.

KB3035129 Update for Windows 10 build 9926 Replaces KB3034229

After activating it, some users reported it is using precious system resources even when it is not running, if you don’t want to speak to the computer using Cortana, you can disable it, here is how.

Disabling Cortana on Windows 10 Taskbar  in build 9926

Right click on the taskbar, hover over the Search and select ‘disabled’ (check the screenshot below).

disable Search on taskbar Windows 10

How to get Build 9879’s Start Menu in Windows 10 Build 9926?

To get her back, enable the Search box or Search icon.