How to use the SUMIF function in Excel to add the values in a range that meet criteria that you specify.

Learn how to use antivirus protection in Windows Security to protect your Windows PC against malware, viruses, and other threats.

Discover how to earn Microsoft Rewards points through various activities and redeem them for exciting rewards.

See a list of options available for starting Windows in diagnostic modes such as safe mode.

On the Security tab, select Custom level, and then under ActiveX controls and plug-ins, do one the following: Allow Automatic prompting for ActiveX controls by selecting Enable . Allow Internet Explorer to Display video and animation on a webpage that doesn't use external media player by selecting Enable .

Learn to add email accounts such as Gmail and Yahoo! Mail to your Outlook.com app so you can view all of your mail from one location.

Learn how to get Microsoft Store updates for your apps and games. Download the latest versions of Microsoft Store apps and games.

If you already have an account signed in to OneDrive and you want to add or remove another account, you’ll do that in OneDrive Settings.

Hotmail 現在為 Outlook.com。 瞭解如何登入以存取您的 Outlook.com、Hotmail、Live 或 MSN 電子郵件帳戶。

Learn how Smart charging in Windows can help your battery last longer over time.