outlook does not stop task when closed

Question

Outlook (classic) will not close unless I restart computer or go into Task manager and close program. Last week tech support removed the lasted Microsoft update to correct problem - but problem is back!

Answer 1

See https://support.microsoft.com/en-us/office/classic-outlook-profiles-with-pop-accounts-and-psts-hang-after-windows-updates-on-january-13-2026-590fe356-ecc2-49f4-b9e3-bd39fafa58f6 . You can install the update from Windows Update.

Answer 2

It seems that you are experiencing an issue where Outlook (classic) does not close properly and continues to run in the background. This can happen for several reasons, including conflicts with add-ins, large mailboxes, or issues with the Outlook data files. Here are a few suggestions to troubleshoot this problem:

1. Check for Updates: Ensure that you have the latest updates installed for Outlook. Sometimes, updates include fixes for known issues.
2. Disable Add-ins: Try disabling any add-ins that might be causing conflicts. You can do this by going to File > Options > Add-ins and managing your add-ins from there.
3. Repair Outlook: You can try repairing your Microsoft 365 programs. Go to Control Panel > Programs > Programs and Features, select Microsoft Office, and choose the Repair option.
4. Use the Troubleshooter: Microsoft provides a Classic Outlook Advanced Diagnostics troubleshooter that can help identify and resolve issues. Make sure you are using the same Windows device that Classic Outlook is installed on.
5. Registry Key: If you have an IMAP account, there might be a registry key that can help resolve the issue. You can find more information on this in relevant forums or support articles.

If the problem persists, you may need to consider reinstalling Outlook or reaching out to Microsoft support for further assistance.

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References:

• Outlook not responding error or Outlook freezes when you open a file or send mail
• Outlook not properly closed?