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.

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

Windows セキュリティでウイルス対策機能を使って、マルウェア、ウイルス、その他の脅威から Windows PC を保護する方法を説明します。

Windows 11 は新しい Windows ユーザー インターフェイスであり、お好みのものにあなたをさらに近づけます。 直感的なナビゲーションと簡単な整理により、Windows 11 はまったく新しい外観、より多くのアプリ、そして創造的で生産的な効率的な方法を備えています。

Learn more about how to find all your apps and programs in the all new Windows Start menu.

See how to install Project 2013 and 2016 and Project Pro for Office 365.

Learn how to change Microsoft account email address or phone number using aliases to sign into your Microsoft account.

The Microsoft Edge feature that blocks pop-ups is effective in preventing websites from automatically opening a new window or tab, or a partial window on top of your current web page. This feature is turned on by default. There are many different types of pop-ups, including advertisements, notices, offers, or alerts that can appear at various times on any web page. Some can be helpful, such as ...

If you’re having problems getting connected to a network and can’t get onto the Internet, here are some things you can try in Windows.

Aprende a actualizar controladores en Windows usando Administrador de dispositivos para actualizar o reinstalar un controlador.