Windows 8 優待購入プログラムSupport for Windows 8.1 has ended Support for Windows 8.1 ended on January 10, 2023. We recommend you move to a Windows 11 PC to continue to receive security updates from Microsoft. Learn more Windows 8.1 Update and Windows RT 8.1 Update (also known as KB 2919355) include improvements that make your favorite apps and settings easier to find and use, provide more familiar mouse and keyboard options
