What is the installed program "Windows Live UX Platform Language Pack" on my Windows 8 computer? Why it is not visible in Control Panel?

"Windows Live UX Platform Language Pack" is an installed program on Windows 8 system managed by Windows Installer.

You will not see "Windows Live UX Platform Language Pack" listed on "uninstall or change a program" in Control Panel, because it is flagged as a hidden system component in the registry (SystemComponent=1).

Information related to "Windows Live UX Platform Language Pack" installed program:

Name: Windows Live UX Platform Language Pack
Publisher: Microsoft Corporation
Size: 44 KB
Version: 16.4.3503.0728
System Component: 1
Identifying Number: {2D416A80-0BB1-4D8B-B770-7BE8F53D5937}
Install Location: 
Install Source: C:\Program Files (x86)\Common Files\Windows Live\.cache\a00783371cdcc7e13\
Install Date: 20121127
Local Package: C:\Windows\Installer\4f470.msi
Package Name: UXPlatformLang.msi
Uninstall Command: MsiExec.exe /I{2D416A80-0BB1-4D8B-B770-7BE8F53D5937}
Windows Installer: Yes

It is recommended to keep "Windows Live UX Platform Language Pack" as an installed program.

⇒ Visible Installed Programs not Using Windows Installer

⇐ "Windows Live UX Platform" Installed Program on Windows 8

⇑ Hidden Installed Programs using Windows Installer on Windows 8

⇑⇑ Windows 8 Installed Programs