Windows 10 Mail and Calendar App Crashing? Fix It Now

If your Windows 10 Mail and Calendar app keeps crashing, freezing, or closing on its own, the fix usually involves repairing or resetting the app from Windows Settings, or reinstalling it via PowerShell. Below are the exact steps to resolve the issue, along with common causes and preventive tips.

Why the Mail and Calendar App Crashes

The Mail and Calendar app in Windows 10 is a Universal Windows Platform (UWP) app, meaning it runs in a sandboxed environment separate from the traditional desktop apps. Crashes can happen for several reasons:

• Corrupted app cache or data – Over time, the app’s temporary files can become corrupted, causing it to fail on launch.
• Outdated app version – Microsoft regularly updates the app, and an outdated version may have bugs that were already fixed.
• Windows system file corruption – If core Windows files are damaged, the app may not function properly.
• Third-party antivirus interference – Some security software can block or disrupt UWP apps.
• Insufficient system resources – Low memory or disk space can cause the app to crash, especially when syncing large mailboxes.

Quick Fix: Repair or Reset the App

The first thing to try is the built-in repair and reset options. These do not delete your email accounts or messages, so they are safe.

1. Open Settings (Windows key + I).
2. Go to Apps > Apps & features.
3. Scroll down and click on Mail and Calendar.
4. Click Advanced options.
5. First, click Repair. Windows will attempt to fix the app without affecting your data. Wait for it to finish, then try opening the app.
6. If it still crashes, go back to the same screen and click Reset. This will clear the app’s data, but your email accounts will remain (you may need to re-enter your password).

Reinstall the App via PowerShell

If resetting doesn’t help, you can reinstall the app completely using PowerShell. This removes the app and then reinstalls the latest version from Microsoft’s servers.

1. Right-click the Start button and select Windows PowerShell (Admin) or Terminal (Admin).
2. Type the following command and press Enter:
   Get-AppxPackage *windowscommunicationsapps* | Remove-AppxPackage
3. Once removed, reinstall it by running:
   Start-Process "ms-windows-store://pdp/?ProductId=9WZDNCRFJHV4"
4. This will open the Microsoft Store page for Mail and Calendar. Click Install to reinstall.

Alternatively, you can use the command Add-AppxPackage -register "$env:ProgramFiles\WindowsApps\Microsoft.WindowsMail_*\AppxManifest.xml" -DisableDevelopmentMode to re-register the existing app without downloading.

Check for Windows Updates

Microsoft regularly patches bugs in the Mail and Calendar app through Windows Update. An outdated system can cause compatibility issues.

1. Go to Settings > Update & Security > Windows Update.
2. Click Check for updates and install any pending updates.
3. Restart your PC and test the app again.

Also, check the Microsoft Store for app updates: open the Store, click the three-dot menu, select Downloads and updates, and click Get updates.

Run the Windows Store Apps Troubleshooter

Windows has a built-in troubleshooter that can automatically detect and fix issues with Store apps, including Mail and Calendar.

1. Open Settings > Update & Security > Troubleshoot.
2. Click Additional troubleshooters.
3. Select Windows Store Apps and click Run the troubleshooter.
4. Follow the on-screen instructions. It may ask you to sign in or reset the app cache.

Common Workarounds and Alternatives

If the app still crashes after all the above, you can use the web version of Outlook (outlook.com) or the new Outlook for Windows (which is a separate app available from the Microsoft Store). Some users find that using the classic desktop version of Outlook (if you have Microsoft Office) is more stable. Another workaround is to create a new Windows user profile and test the app there – if it works, your profile may be corrupted.

Additionally, check if you have enough free disk space (at least 10 GB) and close other heavy applications to free up memory.

Frequently Asked Questions

Will resetting the Mail app delete my emails?

No, resetting the app clears the app’s local data and settings, but your email accounts and messages stored on the server (e.g., Outlook.com, Gmail) remain intact. You may need to re-enter your password and reconfigure settings.

Why does the Mail app crash only when I open a specific email?

This could be due to a corrupted email in your inbox. Try moving that email to another folder (using the web version) or deleting it. Also, check if the email contains images or attachments that might trigger the crash.

Can I use the Mail app without a Microsoft account?

Yes, you can add other email accounts (Gmail, Yahoo, etc.) without a Microsoft account, but you will need to sign in to the app with a Microsoft account to download it from the Store. The app itself requires a Microsoft account for initial setup.

Is the Mail app the same as Outlook?

No, the Mail app is a lightweight UWP app, while Outlook is a full-featured desktop client (part of Microsoft 365). They are separate programs, and the Mail app is free while Outlook requires a subscription.

How do I backup my email before resetting the app?

Your emails are already stored on your email server (e.g., Outlook.com, Gmail). To be safe, you can export them from the web version using the export feature (if available) or simply leave them on the server – they won’t be deleted.

What if the app crashes immediately after opening?

Try running the app in compatibility mode: right-click the app icon, select Properties, go to Compatibility, and check “Run this program as an administrator”. If that doesn’t help, perform a clean boot (disable all non-Microsoft services) to see if a background program is interfering.

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