Outlook.exe remains in Memory and Task Manager after closing Outlook

I came across this situation a couple of times, where the client was complaining about Outlook.exe process continuing to remain in the Task Manager, even after closing the program. Each scenario was different, but I managed to fix it a  couple of times. In this article, I’ll share those possible fixes.

Outlook.exe remains in memory

In most of the cases I have seen, I have found some security suite like Kaspersky, Norton 360, etc. to be the culprits. Each security software has an anti-spam plugin, and sometimes, this causes the Outlook.exe to hang. So in such cases, you could try to disable the add-in and see if it works. I would suggest using OfficeIns to disable the add-ins because it’s much easier than disabling the add-ins from the Add-in Manager of Outlook.

You can download OfficeIns from Nirsoft. Close Outlook. Make sure it’s not running in the Task Manager. Then open OfficeIns. Select the Add-in and Right Click on it. You’ll find an option called “Change Start Mode” and select Disabled and then Select “Change Connect Mode” and select No. Once you disable the add-in, the open Outlook and test it.


If it does works, then contact the software vendor and see what’s causing it.

The second scenario I have seen is when using Team Viewer. Once I had a client with a similar problem. There were no add-ins enabled, as I had disabled all of them. Then I installed Process Explorer and selected “Outlook.exe” then I went to “View” menu and selected “Show Lower Pane”.


I went through each of the Handles from the list and found TeamViewer related files there. But I didn’t find any add-ins in Outlook. Then I noticed this very handle had been placed near the minimize button.


I couldn’t find a way to disable it. So I went to “MSCONFIG” and disabled Team Viewer from “Startup” and “Services” and then rebooted the system. I opened Outlook, waited few minutes and closed it. It was no longer showing up in the Task Manager.

Hope some of these tips help you fix this problem. If not, post it in our forums we’ll help you fix them.

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Shyam aka “Captain Jack” is a Microsoft MVP alumnus and a Windows Enthusiast with an interest in Advanced Windows troubleshooting. Suggestions made and opinions expressed by him here are his personal one's and not of his current employers. He blogs at captaindbg.com.