New Outlook app was just force-installed on Windows 10 PCs

How to prevent forced installation of new Outlook on Windows 10 PCs
Microsoft manifested something that had been a long time coming: forced installation of the new Outlook app on Windows 10 PCs by way of the February 2025 mandatory update. This is the next step in Microsoft’s push to make the new Outlook commonplace.
Windows 10 KB5051974 update force installs new Microsoft Outlook app
Microsoft has released the KB5051974 cumulative update for Windows 10 22H2 and Windows 10 21H2, which automatically installs the new Outlook for Windows app and fixes a memory leak bug.
Windows 10 KB5051974 update adds a new app without asking
Microsoft has released the KB5051974 cumulative update for versions 22H2 and 21H2, adding security fixes and patching a memory leak. However, as reports, the update also includes a surprise: the new Outlook for Windows app.
The new Outlook app was just force-installed on Windows 10 PCs
Microsoft previously only made this measure known via an announcement in the Microsoft 365 Admin Center. But as of update KB5051974, which is mandatory, the new Outlook app has been force-installed for Windows 10 users on versions 21H2 and 22H2.
Microsoft just installed a new app on everyone's Windows 10 PCs, and nobody wants it
The new Outlook app on Windows 10 is poorly received among users. Users have noted slower performance, cloud storage of emails, and invasive ads. Resources are available to learn about data usage and optimize the new app.
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