Learn how to check for, download, and install KB 2919355, an update for Windows 8.1 and Windows RT 8.1.

Get Microsoft billing support. Find help with Microsoft Store purchases, subscriptions, refunds, payment options, and checking your order history.

Training: Microsoft OneDrive lets you store your personal photos, files, and folders in one place, and get to them anytime, anywhere. Learn more in this online training video.

Learn how to use a health report in Windows Security to manage your device performance and keep your device secure.

Découvrez comment installer Office 2013 sur PC ou Office pour Mac 2011.

Smart App Control is a feature of Windows 11 that helps to block malicious, untrusted, or potentially unwanted apps from running on your device.

Set up the Microsoft Authenticator app from the Security info page. Depending on your organization’s settings, you might be able to use an authentication app as one of your security info methods.

Alternatively, you can install any website by going to the top corner of the browser and select Settings and more … > Apps > Install this site as an app.

Learn how to troubleshoot and use the clipboard in Windows to paste multiple items, pin items, and sync your clipboard to the cloud.

You can refer to the contents of cells in another workbook by creating an external reference formula. An external reference (also called a link) is a reference to a cell or range on a worksheet in another Excel workbook, or a reference to a defined name in another workbook.