How to fix Mail app error 0x80040154 or 0x80c8043e in Windows 11/10

Windows There is a predefined application for Mail and Calendar on any Windows system. This makes it very convenient for users to access their mail accounts.

Recently, many Windows users have reported that they are facing problems when trying to open Mail or Calendar applications on Windows systems. The user receives an error message stating that something went wrong. Sorry, we are unable to perform this operation with error code 0x80040154 or 0x80c8043e and the application crashes after the error message window closes.

Users cannot use mail or calendar applications on Windows systems. There may be several reasons for this error.

In this article, we have collected a lot of information about this error and compiled some solutions that can help users solve this problem.

If you are also dealing with this kind of problem, don't worry. Read this article to learn more.

Fix 1 – Clear Microsoft Store Cache

Some users said they simply cleared the Microsoft Store cache to resolve the issue. When the content of the Microsoft Store cache is corrupted or corrupted, it causes this type of error to be thrown on apps installed from the Microsoft Store.

Let’s see how to clear Microsoft Store cache on your system.

Step 1: Press the Windows key on your keyboard and type wsreset.

Step 2: In the search results, look for the wsreset run command.

Step 3: Just right-click the wsreset run command and select Run as administrator.

Step 4: This will launch the wsreset command in the command prompt window.

Step 5: After executing the wsreset command, the command prompt window disappears by itself.

Fix 2 – Use DISM tool to restore system health

Another possible cause of this error is corrupted files in the system. Therefore, these corrupted files must be removed or repaired from the system to resolve this issue using the DISM tool's recovery health.

Follow the steps below to learn how to use the DISM tool to restore system health.

Step 1: Press the Windows R key on the keyboard at the same time, open the "Run" command box.

Step 2: Type cmd in its text box and simultaneously press Ctrl Shift Enter to admin Identity OpenCommand Prompt.

NOTE – You may have to acceptthe UAC that will be prompted on the screen to continue.

Step 3: After opening an elevated Command Prompt window, type the following lines and press Enter key.

DISM /在线 /Cleanup-Image /RestoreHealth

Step 4: This will start searching for all corrupt files present in the system and try to repair them.

Step 5: After the command is executed, you can close the command prompt window and restart the system.

Fix 3 – Rename Comms Folder

All attachments users download from the Mail and Calendar apps go to a folder within a folder named Comms. If any of these attachments in the comms folder gets corrupted, it can lead to problems like the ones mentioned in this article. Therefore, we recommend trying to rename this folder so that the Mail and Calendar applications don't have to look for the comms folder.

Please see the steps explained below on how to find the comms folder and rename it.

Step 1: Press the Windows R key at the same time to open the Run command box.

Step 2: After opening the run box, type C:\Users\%username%\AppData\Local in its text box and press Enter .

Step 3: This will open a folder on your system named Local.

Step 4: Then find the folder named Comms.

Step 5: Once you find the folder Comms, select it and right click on it.

Step 6: Now click on the Rename icon at the top from its context menu as shown in the image below.

Step 7: Name the folder, such as Comms.old, Comms_old, etc., and press Enter.

Step 8: After renaming the Comms folder, close the Local folder.

Step 9: Restart the system. Once the system boots, try accessing the Mail and Calendar applications to see if the problem persists.

Fix 4 – Try creating a new user account and logging in using it

Sometimes, the problem can be related to the user account and its settings. Therefore, you can verify if the problem is with your user account itself by creating a new user account and using it to log into the system. You can then try launching the Mail and Calendar apps.

Here are the steps on how to create a new user account in Windows 11.

Step 1: Press the Windows I keys simultaneously on your keyboard to open the "Settings" app on your system.

Step 2: Then select the “Account” option from the left menu as shown below.

Step 3: Scroll down the Account page and select Other Users from the available options ,As follows.

Step 4: Click on the "Add Account" option under the "Other Users" section.

#Step 5: This will bring up a Microsoft account window.

Step 6: Enter the email address of the Microsoft account that will be used to create the user account and click Next.

#Step 7: Follow the on-screen instructions to create a user account using the Microsoft account details you entered.

Step 8: If you don't have the login information for your Microsoft account, click I don't have the login information for this person below the email or phone text box.

Step 9: You can enter your email address here or continue without a Microsoft account by clicking Add users who don't have a Microsoft account and click Next.

Step 10: In the following window you need to enter all the details like user account name, password, answers to all security questions and click on Next step.

Step 11: Follow any on-screen instructions to complete creating your user account.

Step 12: Once the user account has been successfully created, close it by right-clicking the "Start" button and hovering over " ” or “Exit” option and select “Exit” from the menu to log out from the current user account on the system as shown below.

Step 13: After logging out, log in to your system using your newly created user account.

Step 14: Once logged into the system, try launching the Mail and Calendar applications to see if this works for you.

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