Windows 8.1 build 9448

{{PM|Windows 8.1 build 9448 (fbl_partner_out25)|Windows 8.1 build 9448 (winmain) page should be created]] {{Infobox Windows build }} Windows 8.1 build 9448 is a pre-RTM build of Windows 8.1, which was uploaded to BetaArchive on 18 February 2019 only in the Korean language.
 * build of = Windows 8.1
 * image = Windows8.1-6.3.9448mp-Desktop.png
 * winver = Windows8.1-6.3.9448mp-About.png
 * buildtag = 6.3.9448.0.fbl_partner_out25.130621-2030
 * arch = x86
 * compiled = 2013-06-21
 * timebomb = 2014-01-15
 * rivals = {{Rivals|TCB=https://thecollectionbook.info/builds/windows/build/4345|TCBGallery=https://www.thecollectionbook.info/gallery/?f=/windows/nt%20kernel/windows%208.1/6.3.9448.0/korean/professional%20k}}

Help & Tips
The Help & Tips app is now functional in this build, albeit with several visual bugs.

Absent features
Due to this build being from the  branch, several features from the Milestone Preview aren't included. Those being:

These features would be re-added in the next build.
 * The visible Start button.
 * New options for Start customization.
 * Navigation properties.
 * UI updates to several apps.

Explorer
Title bar text isn't centered on File Explorer and Control Panel windows.