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How to Fix Error 0x800cce05 in Windows 11: Step-by-Step Solutions That Work

Error 0x800cce05 in Windows 11 usually appears when there is a problem with your email app or internet connection. It can stop you from sending or receiving emails properly. This error often affects Mail and Calendar apps, causing frustration for many users.

Fortunately, there are simple ways to fix this issue without needing advanced technical skills. Following step-by-step solutions can help you get your email working again quickly.

This guide will walk you through easy and effective methods to resolve the error 0x800cce05. Each step is explained clearly, so you know exactly what to do and why it matters.

By the end, you should be able to use your Mail app without seeing the error message again.

Quick Note Before You Start

  • Make sure your Windows 11 is updated to the latest version. Updates often fix bugs that cause errors like this.
  • Check your internet connection. A slow or unstable connection can trigger this error.
  • Confirm your email account settings (username, password, server settings) are correct.
  • Close and restart the Mail app before trying any fixes.

Step 1: Restart Your Computer

Sometimes, a simple restart can solve many Windows errors. Restarting clears temporary files and refreshes system processes that might be causing the problem.

  1. Click on the Start menu (Windows icon) at the bottom-left corner of your screen.
  2. Select the Power button.
  3. Choose “Restart” and wait for your PC to reboot.
  4. Open the Mail app again and check if the error is gone.

Step 2: Check Your Email Account Settings

Incorrect or outdated email settings can cause sync errors like 0x800cce05. Verifying your account details ensures the Mail app connects properly to your email server.

  1. Open the Mail app.
  2. Click on the gear icon (Settings) at the bottom-left corner.
  3. Select “Manage Accounts.”
  4. Choose the email account with the error.
  5. Click on “Change mailbox sync settings.”
  6. Check that your username, password, and server details match those provided by your email provider.
  7. Save any changes and try syncing your emails again.

Step 3: Run the Windows Store Apps Troubleshooter

The Mail app is a Windows Store app, and sometimes app-related errors can be fixed using the built-in troubleshooter. This tool automatically detects and tries to fix problems.

  1. Press Windows + I keys to open Settings.
  2. Go to “System” > “Troubleshoot” > “Other troubleshooters.”
  3. Scroll down to find “Windows Store Apps.”
  4. Click on “Run” next to it.
  5. Follow the on-screen instructions and apply any fixes suggested.
  6. After completion, restart your PC and check if the Mail app works without errors.

Step 4: Reset the Mail App

Resetting the Mail app can fix corrupted files or settings that cause errors. This process removes app data but keeps your emails safe on the server.

  1. Open Settings by pressing Windows + I.
  2. Go to “Apps” > “Installed apps.”
  3. Find “Mail and Calendar” in the list.
  4. Click the three dots next to it and select “Advanced options.”
  5. Scroll down and click the “Reset” button.
  6. Confirm the reset and wait for it to complete.
  7. Open the Mail app again and re-add your email account if needed.

Step 5: Update Windows and Mail App

Running the latest software versions fixes known bugs and improves compatibility. Both Windows updates and Mail app updates can prevent errors like 0x800cce05.

  1. Press Windows + I to open Settings.
  2. Go to “Windows Update” and click “Check for updates.”
  3. Install any available updates and restart your PC.
  4. Open Microsoft Store.
  5. Click on the three dots at the top-right and select “Downloads and updates.”
  6. Click “Get updates” to update all installed apps including Mail and Calendar.
  7. After updating, restart the Mail app and check for the error.

Step 6: Disable Antivirus or Firewall Temporarily

Sometimes, antivirus programs or firewalls block the Mail app from syncing. Temporarily disabling them can help identify if they cause the error.

  • Right-click your antivirus icon in the system tray and select the option to disable it temporarily.
  • For Windows Firewall, open Settings > Privacy & Security > Windows Security > Firewall & Network Protection > select your active network > turn off the firewall temporarily.
  • Try syncing your Mail app again.
  • If the error disappears, adjust your antivirus or firewall settings to allow Mail app access.
  • Remember to turn your security software back on after testing.

Alternative Method: Create a New User Account

If none of the above fixes work, creating a new Windows user account can help determine if the problem is related to your current profile.

  1. Open Settings (Windows + I).
  2. Go to “Accounts” > “Family & other users.”
  3. Click “Add account” under “Other users.”
  4. Follow the prompts to create a new local user account.
  5. Sign out of your current account and sign in with the new one.
  6. Open the Mail app and add your email account.
  7. Check if the error still appears.

FAQs About Error 0x800cce05 in Windows 11

Q: What causes error 0x800cce05?

A: It is usually caused by incorrect email settings, corrupted app data, network issues, or conflicts with antivirus software.

Q: Will resetting the Mail app delete my emails?

A: No, resetting only clears app data on your PC. Your emails remain safely stored on your email server.

Q: Can a slow internet connection cause this error?

A: Yes, poor connectivity can disrupt synchronization and trigger this error.

Q: How often should I update Windows and apps?

A: Regularly checking for updates (at least once a month) helps avoid many errors and improves security.

Q: Is it safe to disable antivirus temporarily?

A: Yes, but only for a short time while troubleshooting. Always re-enable your antivirus afterward to keep your PC protected.

When Nothing Works

If the error 0x800cce05 persists after trying all the above steps, consider contacting Microsoft Support for further assistance. You can visit the official Microsoft support page here: https://support.microsoft.com.

Alternatively, you may try reinstalling Windows 11 as a last resort, but this should only be done if you are comfortable with system recovery and have backed up your important files.

Conclusion

Error 0x800cce05 can be frustrating, but it is usually fixable with simple troubleshooting steps. Starting from restarting your PC to resetting the Mail app and checking your email settings covers the most common causes.

Keeping your system and apps updated, ensuring a stable internet connection, and managing security software settings also play important roles in preventing this error.

By following this step-by-step guide, you can resolve the error and get back to using your Mail app smoothly on Windows 11.

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