XBOX Support
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Sign in to Microsoft 365 | Microsoft Support
Learn how to sign in to Office or Microsoft 365 from a desktop application or your web browser.
Applies To:
Excel for Microsoft 365, Word for Microsoft 365, Outlook for Microsoft 365, PowerPoint for Microsoft 365, Access for Microsoft 365, OneNote for Microsoft 365, Project Online Desktop Client, Publisher for Microsoft 365, Excel for Microsoft 365 for Mac, Word for Microsoft 365 for Mac, Outlook for Microsoft 365 for Mac, PowerPoint for Microsoft 365 for Mac, OneNote for Microsoft 365 for Mac, Excel 2024, Word 2024, Outlook 2024, PowerPoint 2024, Access 2024, OneNote 2024, Project Professional 2024, Project Standard 2024, Visio Professional 2024, Visio Standard 2024, Office 2024, Excel 2024 for Mac, Word 2024 for Mac, Outlook 2024 for Mac, PowerPoint 2024 for Mac, OneNote 2024 for Mac, Office 2024 for Mac, Excel 2021, Word 2021, Outlook 2021, PowerPoint 2021, Access 2021, Project Professional 2021, Project Standard 2021, Publisher 2021, Visio Professional 2021, Visio Standard 2021, Excel 2021 for Mac, Word 2021 for Mac, Outlook 2021 for Mac, PowerPoint 2021 for Mac, OneNote 2021 for Mac, Office 2021 for Mac, Excel 2019, Word 2019, Outlook 2019, PowerPoint 2019, Access 2019, Project Professional 2019, Project Standard 2019, Publisher 2019, Visio Professional 2019, Visio Standard 2019, Excel 2016, Word 2016, Outlook 2016, PowerPoint 2016, Access 2016, OneNote 2016, Project Professional 2016, Project Standard 2016, Publisher 2016, Visio Professional 2016, Visio Standard 2016, OneNote for Mac, Microsoft 365 for home, Office 365 Small Business, Microsoft 365 admin, Project Online, Microsoft 365 for Mac, Project for Office 365
How to sign in to Hotmail | Microsoft Support
Hotmail is now Outlook.com. Learn how to sign in to access your Outlook.com, Hotmail, Live, or MSN email account.
Applies To:
Outlook.com
Error 8015190A occurs when you connect to XBOX Live
If you're getting error 8015190A, it may mean there's a problem with the XBOX Live service or your XBOX Live account.
Contact - Microsoft Support
Support for Windows 10 has ended on October 14, 2025. Learn more about your options for Windows 10.
Lock or unlock specific areas of a protected worksheet
How do I lock only specific cells in a worksheet? How do I unlock other elements in a protected sheet? Provide a quick guide to lock or unlock cell areas.
Applies To:
Excel for Microsoft 365, Excel 2024, Excel 2021, Excel 2019, Excel 2016
How to sign in to a Microsoft account | Microsoft Support
Use your Microsoft account to sign in to Microsoft services like Windows, Microsoft 365, OneDrive, Skype, Outlook, and Xbox Live.
Account & profile | XBOX Support
Find solutions for Xbox account and profile issues, manage settings, and get support for your Xbox experience.
更新 Windows 中的蓝牙驱动程序 | Microsoft Support
Windows 11 Windows 10 更新蓝牙驱动程序可以帮助解决连接、配对或检测问题。 使用以下步骤更新驱动程序。 使用设备管理器更新蓝牙驱动程序 选择 “开始”，键入 “设备管理器”， 然后从结果中选择它。 展开 蓝牙 以查看蓝牙设备和适配器的列表。 右键单击蓝牙适配器，然后选择更新 驱动程序 ...
Activate Windows | Microsoft Support
Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.