Blocked file types in Outlook. If you use a Microsoft Exchange Server account and the Exchange Server administrator has configured your Outlook security settings, your administrator might be able to help you.

Read here how you use a USB flash drive or a SD card in Windows 7 for Windows ReadyBoost.

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

Learn how to redeem your Microsoft Rewards points for a huge variety of great products and sweepstakes.

Learn about the message "Wi-Fi isn't secure" that appears in Windows when you're connected to a Wi-Fi network that's not secure.

Learn how to start a party with your friends on your Xbox console, or while playing Xbox games on your Windows or mobile device.

Copilot in Microsoft Teams chat helps you get up to speed on chats by quickly reviewing the main points, action items, and decisions.

To get someone's attention in a channel conversation or a chat, @mention them. Just type @ before their name and then select them from the menu that appears.

Get the latest info on new features for Microsoft Teams with these regularly updated release notes.

Get security info and tips about threat prevention, detection, and troubleshooting. Including tech support scams, phishing, and malware.