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

Get help with signing in, changing passwords, creating and sending mail, deleting mail, creating folders, and more in Outlook on the web.

Learn how to update your security processor or TPM firmware to protect Windows 10 and your device from attacks by malicious software.

Learn how to remove malware from your PC. Use Microsoft Defender Antivirus in Windows 10 or Windows 11 to scan your PC for malware, viruses, or other threats.

The Planner app in Microsoft Teams brings together all your tasks and plans across the Microsoft 365 ecosystem in a single convenient location. It helps you manage tasks more efficiently for individual plans and team initiatives, as well as larger scale projects that are aligned to goals and key strategic objectives.

Learn how to download, install, and configure additional language packs for your version of Windows.

Add or subtract days, months, or years from a date by using a formula or date functions in Excel.

Learn how to connect a Bluetooth device in Windows and adjust Bluetooth pairing settings.

请执行以下任一操作： 在 “翻译为 ”下拉列表中，选择要将页面翻译成的语言。 默认值是为Microsoft Edge设置的语言。

Sum values based on one or more conditions by using the SUMIFS function in a formula.