Error message when going to outlook mail

Question

Error message when going to outlook mail

Ed Berlad 140

Good morning,

I have been getting an error lately when going to my outlook mail. Olk.exe - Entry point not found. I have gone on line and followed the instructions but it keeps coming back. So I removed outlook mail and reinstalled it. Thought it was corrected but this morning it's back. Any suggestions?

Thanks,

Ed

Hornblower409 8,900 Reputation points

2026-04-15T08:31:08.8766667+00:00

@Ed Berlad

There is some confusion because you tagged your Question as Outlook | Windows | Classic Outlook for Windows but your screen shot and the error you are getting clearly indicate New Outlook for Windows.

Could you please confirm that the top of your Outlook looks like this? And this is the Outlook that you have been using for some time?
Ed Berlad 140 Reputation points

2026-04-15T14:13:19.19+00:00

Goodmorning,

This is a snapshot of the header: Outlook Trouble #3.PNG

When the error pops up when first entering, I have to click okay 4 times and the error message will disappear and Outlook will work fine till the next start.
Hornblower409 8,900 Reputation points

2026-04-15T17:24:30.29+00:00

@Ed Berlad said

This is a snapshot of the header

Thank you. So that confirms you are using New Outlook for Windows. (Not Classic Outlook for Windows as shown in the Question tag).

Have you had a change to try my "Clean Sweep" as shown in my Answer of Apr 15, 2026?
Ed Berlad 140 Reputation points

2026-04-15T17:31:53.6233333+00:00

No I wasn't sure what to do at this point exactly! I'm afraid of screwing everything up! So what is the best way forwards?

Thanks, Ed
Hornblower409 8,900 Reputation points

2026-04-15T17:47:41.98+00:00

@Ed Berlad said

afraid of screwing everything up! So what is the best way forwards?

I understand your concern.

Since you only get the error when starting New Outlook for Windows and you can clear it by just clicking OK a few times, I'm tempted to say "Just live with it". Microsoft may roll out a new version at some point that fixes it for you.

If you do try the "Clean Sweep" be aware that:

You will not loose any data (that is all on the Microsoft Cloud servers).

But it will completely reset your New Outlook for Windows back to "square one". Like you had never used the program at all. You will have to add back any of your email accounts and re-do all of your Outlook settings.
Ed Berlad 140 Reputation points

2026-04-15T22:54:56.8666667+00:00

I did delete Outlook and started over but it popped up after the install! That's why I was confused!

Thanks,

Ed
Hornblower409 8,900 Reputation points

2026-04-16T04:06:10.7966667+00:00

@Ed Berlad

Looks like it's not just you. Working a similar error on Reddit.
https://www.reddit.com/r/Outlook/comments/1smpik3/trycreatepackagedependency_error_when_launching/
Hornblower409 8,900 Reputation points

2026-04-16T06:07:48.9733333+00:00
@Ed Berlad

Nix on the "Clean Sweep". Reddit user tried it and it did not fix the error. Sorry, but I'm stumped.

All I can suggest is bringing in Microsoft Support so they can examine your system directly.

From New Outlook for Windows

From the main menu: Help -> ? Help

{This should open the Help side panel}

Search Help = TryCreatePackageDependency error on startup and press Enter

Still need help? [Yes]

If you get "We're here to help": Tell us your problem = {Your problem, again} [Get Help]

[Sign In] {Use any Outlook/Microsoft account}

Choose a support option -> Chat with a support agent in your web browser

4 answers

Your answer

Hornblower409 8,900 Reputation points

2026-04-15T08:31:08.8766667+00:00

@Ed Berlad

There is some confusion because you tagged your Question as Outlook | Windows | Classic Outlook for Windows but your screen shot and the error you are getting clearly indicate New Outlook for Windows.

Could you please confirm that the top of your Outlook looks like this? And this is the Outlook that you have been using for some time?
Ed Berlad 140 Reputation points

2026-04-15T14:13:19.19+00:00

Goodmorning,

This is a snapshot of the header: Outlook Trouble #3.PNG

When the error pops up when first entering, I have to click okay 4 times and the error message will disappear and Outlook will work fine till the next start.
Hornblower409 8,900 Reputation points

2026-04-15T17:24:30.29+00:00

@Ed Berlad said

This is a snapshot of the header

Thank you. So that confirms you are using New Outlook for Windows. (Not Classic Outlook for Windows as shown in the Question tag).

Have you had a change to try my "Clean Sweep" as shown in my Answer of Apr 15, 2026?
Ed Berlad 140 Reputation points

2026-04-15T17:31:53.6233333+00:00

No I wasn't sure what to do at this point exactly! I'm afraid of screwing everything up! So what is the best way forwards?

Thanks, Ed
Hornblower409 8,900 Reputation points

2026-04-15T17:47:41.98+00:00

@Ed Berlad said

afraid of screwing everything up! So what is the best way forwards?

I understand your concern.

Since you only get the error when starting New Outlook for Windows and you can clear it by just clicking OK a few times, I'm tempted to say "Just live with it". Microsoft may roll out a new version at some point that fixes it for you.

If you do try the "Clean Sweep" be aware that:

You will not loose any data (that is all on the Microsoft Cloud servers).

But it will completely reset your New Outlook for Windows back to "square one". Like you had never used the program at all. You will have to add back any of your email accounts and re-do all of your Outlook settings.
Ed Berlad 140 Reputation points

2026-04-15T22:54:56.8666667+00:00

I did delete Outlook and started over but it popped up after the install! That's why I was confused!

Thanks,

Ed
Hornblower409 8,900 Reputation points

2026-04-16T04:06:10.7966667+00:00

@Ed Berlad

Looks like it's not just you. Working a similar error on Reddit.
https://www.reddit.com/r/Outlook/comments/1smpik3/trycreatepackagedependency_error_when_launching/
Hornblower409 8,900 Reputation points

2026-04-16T06:07:48.9733333+00:00

@Ed Berlad

Nix on the "Clean Sweep". Reddit user tried it and it did not fix the error. Sorry, but I'm stumped.

All I can suggest is bringing in Microsoft Support so they can examine your system directly.

From New Outlook for Windows

From the main menu: Help -> ? Help

{This should open the Help side panel}

Search Help = TryCreatePackageDependency error on startup and press Enter

Still need help? [Yes]

If you get "We're here to help": Tell us your problem = {Your problem, again} [Get Help]

[Sign In] {Use any Outlook/Microsoft account}

Choose a support option -> Chat with a support agent in your web browser

Answer 1

Hornblower409 8,900

Known Bug. May be in multiple New Outlook for Windows Versions released in April 2026.

https://learn.microsoft.com/en-au/answers/questions/5861910/olk-exe-entry-point-not-found-(trycreatepackagedep

The April 2026 build of New Outlook introduced a packaging bug where olk.exe calls into Microsoft.Windows.Workloads.dll for a function that isn’t exported

0 comments

Answer 2

Sumit D - IA 169.2K Independent Advisor

Thanks, Ed.

Try this, please.

Press Windows + R, type %localappdata%\Microsoft, and press Enter.

Delete the Olk and OneAuth folders.

Restart Outlook.

This only removes temporary Outlook data that will be recreated automatically. Please try reconfiguring the account and let me know.

I’m eager to hear back and work together to find a solution.

0 comments

Answer 3

Hornblower409 8,900

@Ed Berlad said

I just wanted to say that the issue is back!

I worked a similar issue back in Dec 2025
https://learn.microsoft.com/en-us/answers/questions/5649395/new-outlook-refuses-to-start-any-suggestions

At that time some users found that they had to both remove the New Outlook for Windows App and clear their New Outlook profile (as was suggested by @Sumit D - IA

Exit the Outlook. (Make sure it's not hiding in your Taskbar)
Uninstall Outlook using the normal Windows Uninstall. Settings -> Apps ...
Open a Windows Explorer to %LocalAppData%\Microsoft
Find and delete the "Olk" folder (or rename to "Olk_OLD").
Find and delete the "OneAuth" folder (or rename to "OneAuth_OLD")
Install a fresh copy of New Outlook for Windows from the Microsoft Store.
https://apps.microsoft.com/detail/9nrx63209r7b
Run Outlook and add back your email accounts and redo all of your settings.

If you have multiple email accounts, add them one-at-a-time, and close and re-open Outlook after you add each one.

KENTBEATTY-1699 10 Reputation points

2026-04-16T19:40:35.3133333+00:00

I'm having this issue too starting today 4/16/26. Wasn't a problem before recent updates this week 4/14-4/15 updates. Running Windows 10 ESU.

I ran olk.exe --reset , didn't work, Repair, didn't work. Uninstalled, reinstalled (New Outlook for Windows). Didn't work.

Then tried all of these steps (renamed to Olk_OLD, OneAuth_OLD), installed from MS store again.

The errors are back. I'm guessing it's MS' update fault since others are having the same recent issues. Hope they release a fix for it. Will have to click through and ignore errors for now.
Ed Berlad 140 Reputation points

2026-04-16T23:02:14.12+00:00

Thanks Kent I was going crazy trying to figure out what went wrong or what I might of gotten into! Sorry to here you're going through it but it makes me feel better knowing I'm not the only one!

Ed
Hornblower409 8,900 Reputation points

2026-04-16T23:27:52.9666667+00:00
@KENTBEATTY-1699 @Ed Berlad Thanks for the updates. If you would please, could you report back with your New Outlook for Windows version?

File -> About Outlook, [Copy all]

Paste here just the first line. e.g. Microsoft Outlook Version: 1.2026.407.100
KENTBEATTY-1699 10 Reputation points

2026-04-17T21:01:26.6766667+00:00

Microsoft Outlook Version: 1.2026.407.100

Thanks, Hornblower. I see it's now a known bug so I'm glad an update is coming.
Johan E 0 Reputation points

2026-04-21T08:13:25.9266667+00:00

Have the same problem
Hornblower409 8,900 Reputation points

2026-04-21T12:54:33.9466667+00:00

@Johan E said

Have the same problem

If you mean that you see a TryCreatePackageDependency error when starting the New Outlook for Windows App - This is a known bug. See:

[https://learn.microsoft.com/en-au/answers/questions/5861910/olk-exe-entry-point-not-found-(trycreatepackagedep](https://learn.microsoft.com/en-au/answers/questions/5861910/olk-exe-entry-point-not-found-(trycreatepackagedep)

You can click the [Follow Question] button on that page to receive notifications when there are new comments on that thread.

Answer 4

Sumit D - IA 169.2K Independent Advisor

Hi Ed,

Since you mentioned OLK I think you might be using New Outlook instead of the classic one. I assume you have Classic Outlook.

In the Windows search,

Type cmd, right-click it, and choose Run as Administrator.

Copy and paste this command:

reg add "HKCU\Software\Microsoft\Office\16.0\Outlook\Preferences" /v UseNewOutlook /t REG_DWORD /d 0 /f

Could you please let me know if the Classic Outlook now works?

I’m eager to hear back and work together to find a solution.

Ed Berlad 140 Reputation points

2026-04-13T15:59:50.31+00:00

So I tried that and it said completed successfully, But still have the same message: Outlook trouble #1.PNG

Thanks,

Ed

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Error message when going to outlook mail

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