Learn how to change or reset your Windows password if you've forgotten or lost it.

Hotmail が Outlook.com になりました。 サインインして、Outlook.com、Hotmail、Live、または MSN メール アカウントにアクセスする方法について説明します。

Learn how to uninstall Office from a PC using the Control Panel or with the uninstall support tool.

更改第一页上的页眉或页脚，或者文档中的任何其他页面。

The Program Install and Uninstall troubleshooter helps you automatically repair issues when you're blocked from installing or removing programs.

Safe mode starts Windows in a basic state, using a limited set of files and drivers. If a problem doesn't happen in safe mode, this means that default settings and basic device drivers aren't causing the issue. Observing Windows in safe mode enables you to narrow down the source of a problem, and can help you troubleshoot problems on your PC.

了解在 Windows 中查找 BitLocker 恢复密钥的不同方法，并了解如何在系统上激活 BitLocker。

Saiba como atualizar drivers no Windows usando o Gerenciador de Dispositivos para atualizar ou reinstalar um driver.

Erfahren Sie, wie Sie Windows auf Ihrem PC neu installieren und wie die Aktivierung nach der Installation funktioniert.

Learn about Windows service packs and download the latest updates for Windows 10 and Windows 8.1