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.

Microsoft will start automatically installing its new Outlook email app on Windows 10 devices. It's already pre-installed on most Windows 11 PCs and rolled out to some existing Windows 11 systems.

Designed to replace the current Mail and Calendar apps, the new Outlook can only be removed after it's been installed.

As the push toward Windows 11 continues, Microsoft confirms that Windows 10 users will lose support for apps including Word, Excel, and Outlook.

Microsoft says it will no longer support Office apps, known as Microsoft 365 apps, on Windows 10 later this year. The support cutoff coincides with Windows 10’s end of support on October 14th, and ...

In other words, even if you can’t block the new Outlook app from being installed on your Windows 10 PC, you can always uninstall it afterwards. A pretty annoying move, but not as bad as it could be.