Learn how to log in to Microsoft Teams using our step-by-step guide. Stay connected with your team and start collaborating!

Get Microsoft billing support. Find help with Microsoft Store purchases, subscriptions, refunds, payment options, and checking your order history.

Smart App Control is a feature of Windows 11 that helps to block malicious, untrusted, or potentially unwanted apps from running on your device.

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

Manually download a language for Cortana speech. Go back to Settings > Time & language > Language, select your new language, and then use the up-arrow button to move it to the top of the list and make it the default.

Windows Hello. Windows Hello 可讓您使用您的臉部、虹膜、指紋或 PIN，登入您的裝置、應用程式、線上服務和網路。 即使您的 Windows 裝置可以使用 Windows Hello 生物識別技術，您也能選擇不使用。

Find out how to install the latest driver for your printer. If you recently upgraded Windows, your printer driver might need to be reinstalled.

Microsoft Editor uses enhanced proofing tools for Microsoft 365 subscribers. Identify spelling, grammar, and stylistic issues within your documents.

OneDrive for Business provides one place to store, share and sync your work or school files.

Learn how to check for, download, and install KB 2919355, an update for Windows 8.1 and Windows RT 8.1.