Learn how to install Office 2021, 2019, or 2016 on your PC or Mac.

Learn how to install, reinstall, or activate Microsoft 365 or Office 2024 on a PC or Mac.

Learn how to use the PC Health Check app to help you improve your device performance.

Learn how to use drag and drop to transfer content between your Android device and PC.

Introduction Microsoft released the following security and nonsecurity updates for Office in January 2025. These updates are intended to help our customers keep their computers up to date. We recommend that you install all updates that apply to you. To download an update, select the corresponding Knowledge Base article in the following list, and then go to the "How to download and install the ...

The Microsoft Authenticator app helps you sign into your accounts when you're using two-step verification.

Learn how to download and install apps you need from your Microsoft 365 business subscription.

Learn how to check for the latest Windows Updates and install them to keep your device running smoothly and securely.

This page features a list of common error codes and solutions. Learn how to find your error code quickly.

This troubleshooter assists customers whose machines are not yet updated to the latest release, Windows 10 Version 1607. This update will initially be released only to a small set of targeted customers. This set will expand over time. Windows users can start the assistant from this article.