If you're looking for product keys for Office, apps, games, and more, see Find your Microsoft downloads and product keys. Learn how to find a Windows product key for activation, and when you'll use a digital license instead.

If you can't sign in to your Outlook.com, Hotmail, Live, or MSN email account, or you're not sure how to sign in or sign out, here are some solutions.

Learn how to redeem a gift card, code, or Office product key and spend your balance at Microsoft Store online, on Windows, or Xbox.

Hotmail is now Outlook.com. Learn how to sign in to access your Outlook.com, Hotmail, Live, or MSN email account.

If some Windows functions aren't working or Windows crashes, use the System File Checker to scan Windows and restore your files. Though the steps below might look complicated at first glance, just follow them in order, step-by-step, and we’ll try to get you back on track.

Save a message as a file on your computer or in the cloud. In Mail, from the message list, select the message you want to save so it opens in the reading pane, or double-click the message to open to open it in a new window. From the message header, select More actions > Save as.

Advanced Outlook.com security for Microsoft 365 subscribers. Learn about encrypted messages in Outlook.com. Encrypt messages using S/MIME in Outlook on the web. Signing your email messages with a digital ID helps to prove your identity and prevent message tampering.

Use this app to try to recover lost files that have been deleted from your local storage device (including internal drives, external drives, and USB devices) and can’t be restored from the Recycle Bin.

SharePoint is a browser-based app that you connect to through your web browser, like so: Go to office.com, and sign in to your work or school account. In the upper left corner of the window, select the app launcher > All apps > SharePoint.

This article describes how you can digitally sign a macro project on Windows by using a certificate. If you don't already have a digital certificate, you'll need to get one. Tip: To use or test macro projects on your own computer, you can create your own self-signing certificate by using the Selfcert.exe tool.