https://arstechnica.com/gadgets/2021/11/expired-windows-11-certificate-breaks-some-built-in-apps-and-tools/ > If you've been noticing strange issues with some of Windows 11's built-in apps and tools since the calendar rolled over to November, you're not alone. In a post on Microsoft's Known Issues page for Windows 11, the company says that an expired digital certificate is rendering some users "unable to open or use certain built-in Windows apps or parts of some built-in apps."