What is the scheduled task "\Microsoft\Windows\Windows Media Sharing\UpdateLibrary" on my Windows 7 computer?

"\Microsoft\Windows\Windows Media Sharing\UpdateLibrary" is a scheduled task on Windows 7 system added as part of Windows installation.

You will see "\Microsoft\Windows\Windows Media Sharing\UpdateLibrary" listed on Task Scheduler with the following information:

Name: UpdateLibrary
Location: \Microsoft\Windows\Windows Media Sharing
Description: This task updates the cached list of folders and the security 
   permissions on any new files in a user's shared media library.
Actions: "%ProgramFiles%\Windows Media Player\wmpnscfg.exe" 
Triggers: On custom event filter
History: 

Program file information about "wmpnscfg.exe":

File name: wmpnscfg.exe
File path: C:\Program Files\Windows Media Player\wmpnscfg.exe
File size: 70656 bytes
Last modified time: 7/13/2009 9:39:56 PM
File description: Windows Media Player Network Sharing Service Configuration Application
File version: 12.0.7600.16385 (win7_rtm.090713-1255)
Company name: Microsoft Corporation

"wmpnscfg.exe" may never get executed.

It is recommended to disable "\Microsoft\Windows\Windows Media Sharing\UpdateLibrary" as a scheduled task.

⇒ "ConfigNotification" Scheduled Task on Windows 7

⇐ "BfeOnServiceStartTypeChange" Scheduled Task on Windows 7

⇑ System Scheduled Tasks on Windows 7

⇑⇑ Windows 7 Scheduled Tasks