Download and run the 'Show or hide updates' troubleshooter from here.Those who don't want to install this update on their systems can follow these steps: 'This update will run one time silently without installing anything on the user's device.' 'This update is intended to help Microsoft identify the number of users running out-of-support (or soon to be out-of-support) versions of Office, including Office 2013, Office 2010, and Office 2007,' Microsoft explains in a support document published on January 17 and first spotted by Deskmodder. However, the advisory doesn't mention what information the KB5021751 update will check for and what will be sent to Microsoft servers. The company says the goal is to determine how many customers are still using outdated Office versions. Redmond added that no device restart would be required after installing KB5021751 via Windows Update.

No files will be installed on systems that receive this update, but instead, it will run once to check if the Microsoft Office installation is outdated or will soon require an upgrade. Microsoft is pushing the KB5021751 update to find out how many of its customers are using an Office version that has reached its end of support or will soon be out of support.

Office installation cleanup tool