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Learn how to sign in to Office or Microsoft 365 from a desktop application or your web browser
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Microsoft Support is here to help you with Microsoft products Find how-to articles, videos, and training for Microsoft Copilot, Microsoft 365, Windows 11, Surface, and more
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Learn how to manage your Microsoft devices Add, remove, register, or rename a device on your Microsoft account
- Windows 10 support has ended on October 14, 2025 - Microsoft Support
Windows 10 support ends on October 14, 2025 Upgrade to Windows 11 now to ensure continued security and feature updates Learn more about the transition
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Learn how to install Office 2021, 2019, or 2016 on your PC or Mac
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Get support, help, and learning resources for Microsoft 365 Organize your life, expand your creativity, and protect what’s important with Microsoft 365
- Install or reinstall classic Outlook on a Windows PC - Microsoft Support
More help If you're using a work or school account and couldn't install classic Outlook following the steps above, contact the IT admin in your organization for assistance
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