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Outlook email slow to load and open folders

  • 12 replies
  • 3 have this problem
  • Last reply by FredMcD

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Having used Firefox and Outlook (Hotmail) email for many years I now find that Firefox takes 2 to 3 mins to open Outlook and I have to open folders twice (first open always states 'retry'

Have experimentd with Microsoft Edge and Google Chrome (although I do not like them as browsers) and my Outlook email has no problem from these browsers.

Is there a solution?

All Replies (12)

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hello alanlflower,

  1. Outlook safe mode
  2. Disable add-ins
  3. Find problematic add-ins
  4. Disable hardware graphics acceleration
  5. Disable RSS feeds
  6. Enable auto archive
  7. Update Outlook
  8. Download complete items
  9. Enable cached exchange mode
  10. Manage PST files
  11. Recreate Outlook profile
  12. Microsoft exchange server problem
  13. Sending or receiving large email

2 . When troubleshooting Microsoft Outlook first thing you should do is to open it in safe mode When this mode is enabled, Outlook will load only essential components to perform basic tasks . Add-ins won’t be loaded as well, so you will notice that many of the functions won’t work . Follow the below steps to open Outlook in safe mode .

  • First close open Outlook application.
  • Press ‘Win + R’ keys to open Run prompt.
  • Type ‘outlook /safe’ in and hit enter.
  • Outlook will open in safe mode.

3 . Remove Add-ins

If your Outlook performs smoothly in safe mode , then you may have bad add-ins that causes performance issues . Evaluate your add-ins and find out which one that may potentially cause performance issues . Follow these steps :

  • First create a desktop shortcut for Outlook.
  • Right click on the desktop shortcut Outlook icon and choose ‘Run as administrator’ from the context menu .
  • When Outlook opens , go to ‘File > Options’ :
  • Go to ‘Add-ins’ menu in the left sidebar and then choose ‘COM Add-ins’ from ‘Manage’ dropdown . Click on Go .
  • Uncheck all the checkboxes to disable all add-ins.

4 . Finding Problematic Add-ins

Outlook 2016 has an option to find the add-in that cause slow performance . Go to ‘File > Info’ menu . Scroll down on the right pane and click on the ‘Manage COM Add-ins’ button . This section will list out all the add-ins that causing slow performance and crashing Outlook .

You can check how much time delay happens with each add-in and disable the add-in if you don’t need it .

4 . Disable Hardware Graphics Acceleration :

If you use an affordable laptop with low-performance processor and integrated graphics , enabling graphics acceleration may end up causing poor performance and freezes . Follow these steps :

5 . Open Microsoft Outlook.

  • Go to ‘File > Options > Advanced’ .
  • Uncheck ‘Disable hardware graphics acceleration’ under ‘Display’ section .
  • Click OK and save your changes .

more visit link:

[https : // www . webnots . com / fix - microsoft-outlook-slow-loading-issue/ link text]

tell me its helps:

Thank you!

Modified by ARMAN KHAN

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Many thanks for a very prompt and full reply. It hasn't solved my problem but has made me discover that I seem to be running Microsoft 365 and that Outlook does not appear to be loaded.

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Can pull up the log in/sign in but having entered the password (coreectly) it can then take two minutes or more to display my inbox.

outlook .live .com / mail / inbox no problem

calling up account entering screen no problem calling up password entering screen no problem but after entering password there is a delay

Hope this helps explain my situation etc

Also when trying to open folders from the inbox I have to open twice

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Many site issues can be caused by corrupt cookies or cache.

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.

If there is still a problem, Start Firefox in Safe Mode {web link}
by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh).
Did this help?

While you are in safe mode;

Try disabling graphics hardware acceleration in Firefox. Since this feature was added to Firefox it has gradually improved but there are still a few glitches.

How to disable Hardware Acceleration {web link}

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Thanks for a prompt and helpful response. I followed right through and found no improvement to 'opening' speed so reinstated graphics acceleration.

When I signed out and back in opening soeed had not changed but the folders now open on first try (just clearing cache & cookies).

Will check opening speed again when I have shut down PC and logged in again after lunch. If there is further improvement I will let you know.

Thanks for the help


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Please keep us posted.

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Important This article contains a section that shows how to help lower security settings or how to turn off security features on a computer. You can make these changes to work around a specific problem. However, before you make these changes, we recommend that you evaluate the risks that are associated with implementing this workaround in your particular environment. If you implement this workaround, make sure that you follow any appropriate additional steps to help protect the computer.


This article describes how to troubleshoot performance issues in Microsoft Outlook.

You may experience one or more of the following performance issues in Outlook:

* Outlook seems to be unresponsive.
  • Outlook seems to stop responding for a long time
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Sorry but to what 'workaround' are you referring?

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Many thanks for that. Looks like it could take me a few days to work through!!!!!!

Thanks for your help

I'm sure that in there somewhere is the solution so I will marked as 'solved' to clear the thread but will let you know if I can identify a specific solution


Alan F

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Keep us posted.