Outlook Stuck on Verifying Data Integrity During Startup

  

Mark Regan
Published: February 13th, 2026 • 6 Min Read

You are happily communicating via email with your contacts on Microsoft Outlook, and suddenly, your Outlook closed automatically. You’re trying to restart your Outlook application, but your Outlook stuck on verifying data integrity, and you are unable to communicate with your Outlook contacts. Don’t worry, you are going to get the right and best solution to resolve the Outlook verifying data integrity issue in just a few clicks.

In this blog post, we are going to cover why users face Outlook verifying data integrity problems, with their usual main reasons. Additionally, we are also sharing the two solutions that are manual and professional to fix Verifying data integrity in Outlook. Read this blog post till the end to find the right approach for the problem “Outlook verifying data integrity.”

Before knowing the using the solutions, first start with understanding the root cause of why this happened with users.

Reasons why Outlook Stuck on Verifying Data Integrity

Verifying data integrity in Outlook happens mainly with few reasons that are listed below.

• Outlook Updates: When your Outlook goes into update mode due to the setting of Auto update, then Outlook closes automatically
• Antivirus Software: Sometimes the installed antivirus or malware software blocks the working of Outlook, due to which your Outlook applications quit automatically and do not open again.
• Account Corruption: When your accounts get corrupted due to Oversizing of PST files, improper shutdowns, or accidental clicks on suspicious links, then Outlook closes automatically.
• Faulty Application: Sometimes, users use pirated versions of the Microsoft Office package, which have some bugs that are not solved completely, due to which this problem occurs.

These were the major reasons that tell why you see the Outlook verifying data integrity message when you open your Outlook application.

Let’s have a look at the solution to fix verifying data integrity in Outlook in the next section.

Solve Outlook Keeps Verifying Data Integrity Issue Manually

You can solve this issue with three manual ways, which are described below. Follow each manual way’s instructions carefully to resolve Outlook verifying data integrity on startup.

1^st Method: Outlook Updates

1. Open the Outlook application on your desktop PC.
2. Then, go to the file menu, click on the given “office account” option.
3. After that, click on the update option.
4. You will see a button labeled “Disable Updates.”
5. Then, click that button to stop automatic updates.
6. Done! After the completion of the current update, your outlook opens normally.

2^nd Method: Antivirus Software

1. Open your installed antivirus software on your computer.
2. Go to the settings of the antivirus and select the connected application with the antivirus.
3. Then, turn off the button of Outlook-related protection.
4. Done! After that, your Antivirus software stops blocking your Outlook application.
5. Your Outlook starts working normally.

3^rd Method: Faulty Application

1. Open the control panel in your Windows Operating System.
2. Go to the “Add and Remove Programs” menu.
3. Then, select the currently installed “Microsoft Office” package.
4. After that, right-click and choose uninstall.
5. Use the original version of Microsoft Office from the official website.
6. Done! Your official Outlook will work normally.

Using the above-described manual solution, you can fix the Outlook stuck on verifying data integrity problem. But before using all the above solution be aware of the limitations of the above solutions.

Limitations of Manual Solutions

• The process is lengthy and not easy to understand for non-tech users.
• Disabling updates can cause you to miss out on new features pushed by Outlook.
• Outlook Updates fixes the bugs of current installed version.
• Turning off the antivirus button for Outlook or other Microsoft applications will increase the risk of malware and virus attacks.
• Uninstalling Microsoft Office could result in the loss of Outlook and other Office apps files.
• Reinstall Microsoft Office from the official site, take time, and require product keys and account information for verification.
• If the issue does not arise from faulty application, then the Office un-installation becomes useless.

These were the major limitations of using manual solutions to fix the Outlook data file verifying data integrity issue.

To overcome these limitations and for a faster solution of Outlook data file verifying data integrity problem, you can try the next solution described below.

Professional Solution to Fix Outlook Verifying Data Integrity Issue

As you know, the manual solutions to solve the Outlook verifying data integrity problem have their limitations, which makes it hard to solve this issue. In such cases, you can try BitRecover OST Repair Wizard. This tool simply repairs your corrupted OST files, making them workable again, so that your Outlook starts working normally without any limitations. It maintained data integrity during the complete repair process and kept your email attachments safe.

Steps of Professional Solutions

1. Open the application on your Windows PC, click Next.
2. Select an option between files or folders and add OST files that you are unable to access.
3. Then, check the OST folder you want.
4. After that, click on the Repair button to get a start rearing Outlook OST file.
5. Done! After that, your Outlook stats are normally without showing Verifying data integrity in the message.

Advantage of Professional Solutions

• You can get a filter option that helps you to get only the folder which you want to repair.
• This software allows conversion of OST files into PST with emails and contacts.
• It recovers deleted items from the OST files with complete safety of email formats and attachments.
• This software is specially created with a simple user interface that makes it easy to use for both tech and non-tech users.

Final Thoughts

In this blog, we covered the topic of why the user’s Outlook stuck on verifying data integrity. We explained the major reasons why it happens mostly, and shared the three manual solutions to fix the Outlook verifying data integrity issue. All three manual solutions have some limitations that quickly fix the main problem of Outlook and give temporary relief from the actual problem. In such a case, the use of the suggested solution fix Verifying data integrity in Outlook issue easily and quickly with data integrity that every user wants.