Learn about modems and Internet connections, security, sharing files and printers, and how to set up a wireless network in your home.

Need help setting up an Xbox account or signing in to Xbox on your console, PC, or mobile device? This solution will help you sign in or create a new account.

Office または Microsoft 365 を購入したときにプロダクト キーが付属していた場合は、使用している製品に対応する以下の Web サイトのいずれかにプロダクト キーを入力します。

Find your Wi-Fi network password in Windows, so you can connect to your Wi-Fi network on other devices.

Learn how to reset your PIN if you aren't signed in to Windows and having trouble using your PIN.

Send large files by using file sharing, cloud services, or other solutions for working around file size limits in Outlook.

If your purchase of Office or Microsoft 365 came with a product key, you enter your product key on one of the websites listed below for your product.

Obtenga información sobre cómo instalar, reinstalar o activar Microsoft 365 u Office 2019 en un equipo PC o Mac.

Learn how to share documents, links, and pictures with nearby devices using Bluetooth or Wi-Fi in Windows.

Improve security, evaluate and mitigate the risks of running macros, and see how to enable or disable macros for Microsoft 365.