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  1. Classic Outlook not responding, stuck at "Processing," stopped working ...

    Did you get an Outlook not responding error? Is Outlook stuck on a screen that simply says "Processing"? Or does Outlook freeze or stop working when you're opening a file or sending an …

  2. Outlook for Windows not responding, hangs, freezes, or stops working

    Try these steps whenever new Outlook for Windows stops responding, hangs, freezes, or stops working. Restart new Outlook Right-click Start and select Task Manager. Select Microsoft Outlook, then End …

  3. January 24, 2026—KB5078127 (OS Builds 26200.7628 and 26100.7628) …

    Jan 24, 2026 · This out-of-band update for Windows 11, version 25H2 and 24H2 (KB5078127) is cumulative. It includes updates from previous security and non-security releases, along with an …

  4. Outlook crashes or stops responding when used with Office 365

    This article describes how to troubleshoot Microsoft Outlook when it's used together with Microsoft 365 and: Outlook stops responding (hangs). Outlook crashes even though you aren't actively using it. …

  5. Repair apps and programs in Windows - Microsoft Support

    This article explains how to repair apps and programs in Windows 10 and use Settings to fix common app issues without reinstalling. Select Start > Settings > Apps > Apps & features.

  6. January 13, 2026—KB5073455 (OS Build 22631.6491)

    Jan 9, 2024 · This cumulative update for Windows 11, version 23H2 (KB5073455), includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview …

  7. Fixes or workarounds for recent issues in new Outlook for Windows

    Talk to support. If you have a Microsoft 365 for home subscription, or you purchased a one-time download of Office 2016, click the Contact Us link at the bottom of this page. Ask the community Get …

  8. Fix touchpad problems in Windows - Microsoft Support

    Try to fix touchpad problems in Windows by updating drivers using either Windows Update or Device Manager or by reinstalling the touchpad.

  9. Fixes or workarounds for recent issues in classic Outlook for Windows

    Mar 12, 2026 · Outlook known issues in the June 2017 security updates Last updated: July 11, 2017 The issues documented in this section have been reported after installing the recent updates listed …

  10. January 24, 2026—KB5078132 (OS Build 22631.6495) Out-of-band

    Jan 9, 2024 · This out-of-band update for Windows 11, version 23H2 (KB5078132) is cumulative. It includes updates from previous security releases, along with an additional fix. To learn more about …