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  1. Microsoft Support

    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.

  2. Contact Us - Microsoft Support

    Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

  3. Windows 10 support has ended on October 14, 2025

    Oct 14, 2025 · 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.

  4. Customer service phone numbers - Microsoft Support

    Nov 5, 2025 · This page provides support links for home users and support phone numbers for business users.

  5. Windows troubleshooters - Microsoft Support

    These often help resolve issues without the need to contact support. If a troubleshooter is available for your issue, select Run to start that troubleshooter. Windows troubleshooters Get …

  6. Microsoft 365 help & learning - support.microsoft.com

    Get support, help, and learning resources for Microsoft 365. Organize your life, expand your creativity, and protect what’s important with Microsoft 365.

  7. October 14, 2025-KB5066743 Cumulative Update

    Oct 14, 2025 · How to obtain help and support for this update Help for installing updates: Windows Update FAQ Protect yourself online and at home: Windows Security support Local …

  8. Ways to install Windows 11 - Microsoft Support

    Feb 4, 2025 · This support article was originally published on September 30, 2021, when Windows 11 was first released to the public. At the time of publication and still today, the …

  9. Errors CAA2000B, 4usqa, and 49dvs when trying to sign in to …

    May 7, 2025 · Error Something when wrong. [49dvs] Initial support cases indicate the issue was caused by a disabled service principal for resource ID: 40775b29-2688-46b6-a3b5 …

  10. .NET 8.0 Update - September 9, 2025 (KB5066233) - Microsoft …

    Sep 9, 2025 · For assisted support with .NET Core technologies, contact a Microsoft Support Professional. You need to be on a supported servicing level (the latest available servicing …