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  • Clair Gilliam
  • 4457133
  • Issues
  • #16

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Created Nov 06, 2025 by Clair Gilliam@clairgilliam42Maintainer

Sign issue when start-up Outlook Microsoft Q&A

If you have a large number of items in any single folder, you may experience performance issues during certain operations. For more information, see Outlook performance issues when there are too many items or folders in a cached mode .ost or .pst file. When you install Office, an Inbox Repair Tool (SCANSPST.EXE) is also installed on your PC. The Inbox Repair Tool can resolve issues by scanning your Outlook data files and repairing errors. If your antivirus software includes integration with Outlook, you may experience performance issues.

If you can open the original Outlook Data File, you might be able to recover additional items. The Inbox Repair tool creates a backup file with the same name as the original, but with a .bak extension, and saves it in the same folder. There may be items in the backup file that you might be able to recover that the Inbox Repair tool couldn't.

We can fix the problem for you, or you can use the troubleshooting steps we're providing below to help resolve these startup issues. A corrupted profile, a damaged PST file, faulty add-ins, or improper Outlook startup settings often cause this issue. Should you decide to remove a profile, back up the data files first. All offline cached content will be deleted when you choose Remove. For more information, see Introduction to Outlook Data Files (.pst and .ost). If Outlook worked correctly the last time and nothing has changed about your account configuration, then checking if things work correctly in Safe Mode is a good first step.

If it never worked before or if you are starting Outlook for the very first time, it could very well be that you have not configured your mail account correctly. A common mistake is choosing for an Exchange account while in fact you are using a POP3 or IMAP account. Just to make sure you are not how to stop Outlook freezing trying to troubleshoot an issue which has already been solved, before you begin verify that you have installed all updates for your version of Outlook. I’m not certain to which post you’re referring, but everything that’s been mentioned so far can be done directly by the user. No elevated permissions are required to do any of these steps.

If it does, the problem is definitely in your antivirus software. In this case, you can either contact its vendor for assistance or simply choose another protection program. When you install Outlook, an Inbox repair tool (scanpst.exe) is also installed on your PC. The Inbox repair tool can resolve problems by scanning your Outlook data files, and repairing errors. To use the Inbox repair tool, exit Outlook, and then follow the steps in Repair Outlook Data Files (.pst and .ost). As your mailbox size increases, more resources are required to open each folder.

If the check box is cleared, the service or startup program doesn't run when you restart the computer. To keep up with new viruses as they're created, antivirus software vendors periodically provide updates that you can download from the Internet. Download the latest updates by how to stop Outlook freezing visiting your antivirus software vendor's website.

Have also login in another computer with this account but there is also coming the dialog with the message. My question is, how can I see what document is Outlook referring to? In Outlook thru Office.com, the account has no issue.

I would say first things first is figure out if any of how to stop Outlook freezing these actually resolves her issue, and then (if so) document it on a quick 1-pager that she can follow if/when you’re not available. When the scan is done and errors have been fixed, run scanpst.exe again until no errors are found anymore. If after scanning the file more than 3 or 4 times errors are still found, you might want to copy over your data in a new pst-file. We have tried all things mentioned above (except reconnecting the MS account), but the only solution so far is deleting the users profile. If I run an online repair and reboot her PC it will usually work for a day or two. Kinda at a loss at this point, I am thinking about wiping the PC and starting again.

If repairing your Microsoft 365 programs didn't resolve your issue, move on to the next step. When you start Windows normally, several applications and services start automatically and then run in the background. These applications and services can interfere with Outlook. A Selective Startup or "clean boot" process can help you identify problems that are caused by application conflicts. Sometimes you have to run scanpst multiple times on the same pst until it corrects all the errors.

Find solutions to common problems or get help from a support agent. To get help and troubleshoot other Microsoft products and services, enter your problem here. Some customers may how to stop Outlook freezing not be able to see their Profile, Account or Sign Out options when selecting their picture on the top toolbar. Some users may not be able to empty their Deleted Items folder. We will update this article as soon as we have more information on a fix. While we fix the problem, you can send the file as a OneDrive link.

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