classic outlook

Question

classic outlook

Karoline Kempadoo 40

hi please advise why classic outlook stops working and then i go into new outlook deleted some emails and then when i go back to classic outlook it works again.

then more emails that come in i have to go thru same process .

i cannot work in new outlook -- the format and method of working is horrible.

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Answer accepted by question author

Anonymous

Hi @Karoline Kempadoo

Thank you for reaching out to the Microsoft Q&A Forum.

Based on your description, it appears you may be encountering a known issue affecting Classic Outlook for Windows that started after the January 13, 2026 Windows Update, specifically KB5074109.

Microsoft’s advisory is here: Classic Outlook POP account profiles hang and freeze after Windows 11 update to KB5074109

To better understand your situation, could you please confirm whether you are using a POP account and whether your device has installed Windows update KB5074109?

If you find that KB5074109 is installed, you may want to consider uninstalling it and then restarting your computer. Here are the steps:

-Open Settings and select Windows Update

-Choose Update history

-Scroll down and select Uninstall updates

-Locate KB5074109

-Click Uninstall, then restart your PC

User's image

Numerous cases have been reported, and several users have confirmed that uninstalling KB5074109 allowed Outlook to work normally again.

Note: Removing an update may reduce security posture temporarily, so if you’re in a managed environment, please coordinate with your IT administrator.

I hope this helps

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Karoline Kempadoo 40 Reputation points

2026-01-20T14:52:01.9433333+00:00

HI Dora i am uninstalling , let's see if this works.

Why is the new outlook so difficult to work in and why call it new when it does not function like classic.
Karoline Kempadoo 40 Reputation points

2026-01-20T16:09:33.1+00:00

Hi Dora it doesnt work , is there a specialist that can look at my computer remotely
Anonymous

2026-01-21T09:42:10.9133333+00:00

Hi @Karoline Kempadoo

Thank you for the update. I’m sorry to hear that the issue is still occurring.

Since uninstalling the Windows update did not resolve the issue, you may want to consider moving PST files out of OneDrive by following the guidance here: How to remove an Outlook .pst data file from OneDrive - Microsoft Support

If you need remote assistance for a Microsoft 365 business product such as Classic Outlook for Windows, you will need to raise a support ticket by signing in to Microsoft 365 Admin Center and clicking the "Help & support" icon, if you have an appropriate administrator role.

For further instructions, please follow this guide: Get support - Microsoft 365 admin | Microsoft Learn.

If you are an end user and do not have an administrator role, you can open Outlook, select Help > Support, and follow the on-screen steps to submit a support request, or contact your organization’s IT administrator for further assistance.

-For Classic Outlook:

-For New Outlook:

Thank you for your understanding and patience.

2 additional answers

Your answer

Karoline Kempadoo 40 Reputation points

2026-01-20T14:52:01.9433333+00:00

HI Dora i am uninstalling , let's see if this works.

Why is the new outlook so difficult to work in and why call it new when it does not function like classic.
Karoline Kempadoo 40 Reputation points

2026-01-20T16:09:33.1+00:00

Hi Dora it doesnt work , is there a specialist that can look at my computer remotely
Anonymous

2026-01-21T09:42:10.9133333+00:00

Hi @Karoline Kempadoo

Thank you for the update. I’m sorry to hear that the issue is still occurring.

Since uninstalling the Windows update did not resolve the issue, you may want to consider moving PST files out of OneDrive by following the guidance here: How to remove an Outlook .pst data file from OneDrive - Microsoft Support

If you need remote assistance for a Microsoft 365 business product such as Classic Outlook for Windows, you will need to raise a support ticket by signing in to Microsoft 365 Admin Center and clicking the "Help & support" icon, if you have an appropriate administrator role.

For further instructions, please follow this guide: Get support - Microsoft 365 admin | Microsoft Learn.

If you are an end user and do not have an administrator role, you can open Outlook, select Help > Support, and follow the on-screen steps to submit a support request, or contact your organization’s IT administrator for further assistance.

-For Classic Outlook:

-For New Outlook:

Thank you for your understanding and patience.

Answer 1

Karoline Kempadoo 40

HI Dora it still doesnt work after the unistallation. Is there a microsoft person that can look at my pc ?

0 comments

Answer 2

Classic Outlook may stop working due to various issues, including conflicts with the new Outlook or problems with the user profile. When you switch to the new Outlook and delete some emails, it might help clear up some temporary issues or conflicts that are causing Classic Outlook to malfunction. This could be why you find that Classic Outlook works again after performing those actions.

If you are consistently experiencing this issue, it might be beneficial to create a new Outlook profile or run the Classic Outlook Advanced Diagnostics troubleshooter to identify and resolve any underlying problems. However, please note that the troubleshooter does not work in the new Outlook for Windows, so ensure you are using Classic Outlook for this step.

If you continue to have difficulties, consider reaching out to Microsoft support for further assistance.

References: