Corrupted or broken files in Microsoft Office or Microsoft 365 can cause serious performance issues. Use the repair your office option in Control Panel to get back on track. A virus or antivirus software issue can wreak havoc on your system, and Outlook won’t escape unscathed. Run a scan using reliable antivirus tools. Outlook constantly Not Responding if the Outlook data files contain errors.

If Outlook is NOT able to start in safe mode, then try the next proposed solution below, entitled Create a new Outlook profile. Starting Outlook in safe mode, which starts Outlook without add-ins loaded, can tell you if an add-in is the source of the problem. Try these troubleshooting steps in the order presented here, from simple to more complicated.

Add a contact to your Favorites by selecting a contact in the list, and then selecting Add to favorites. When you add someone as a favorite in People, they'll also show up under Favorites in Mail, and the other way around, provided that the contact has an email address. Use the People page to find, view, create, and edit contacts and contact lists. To learn more about managing contacts in Outlook.com, go to Create, view, and edit contacts and contact lists in Outlook.com.

The Scanost.exe tool is no longer available starting in Outlook 2010. We now recommend that you delete your offline Outlook Data File (.ost) and that you let Outlook redownload the information from the server that is running Exchange Server. Rohan Wiese is a Technical Content Writer at Aryson Technologies, specializing in databases, e-mail recovery, and e-mail migration solutions. To resolve this issue, delete your .ost file and that you let Outlook redownload the information from the server that is running Microsoft Exchange Server.

Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Try steps 1 through 3 in order until the issue is cleared. If you see a .pst file instead, skip this fix and check fix 6 below. 5) Wait for the program to detect the latest version of Outlook, and then follow the on-screen instructions to update your Outlook.

Third-party add-ins are helpful… until they’re not. Outdated or conflicting ones can mess with Outlook’s core performance, causing unexpected slowdowns or outright failure to launch. Create your account and connect with a world of communities.

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 fix Outlook problems visiting your antivirus software vendor's website.

If you can't choose any of the menu options, type inside an email message, calendar event, or contact, Outlook may have frozen. There are three steps you can take to try to get Outlook working again. We recommend setting Windows Update to automatically download and install recommended updates. Bug fixes, new features, and performance enhancements are released regularly. There are a number of possible reasons for Outlook to behave this way.

Also, we go over the stepwise working procedure of both solutions and the reasons behind PST file corruption issues. The Inbox Repair tool or ScanPST.exe is not a convenient way because of multiple restrictions. Moreover, this tool can quickly recover email messages, calendars, tasks and other data from corrupted PST files.

The first step is to check whether the PST file exists in its original location. You can also download the trial tool to try and test the working of the tool before buying the premium edition. If your PST file is stored on a network drive, ensure that the drive is accessible and that you have the necessary permissions. Reconnect to the network or contact your system administrator for assistance.

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 fix Outlook problems Outlook Data Files (.pst and .ost). A corrupted profile, a damaged PST file, faulty add-ins, or improper Outlook startup settings often cause this issue.

In this case, it might be easier to just create a new profile. Outlook has a bug where it repeatedly prompts you for your password, even after you've logged in. This slows down productivity and quite frankly is just a total nuisance. Just as your files can easily become corrupted, so can your Outlook fix Outlook problems profile. This usually happens when you've switched versions of Outlook but your profile did not update.

However, before that, you must figure out the real cause of the issue. Later, go for the best solution that suits the cause of the Outlook issue. Additionally, if the issue causes PST file corruption, use the suggested software for better results. However, we came across many users who are still struggling with this Outlook issue. They still wonder ‘Why is Outlook constantly not responding? ’ So, it is possible that your PST file will get corrupted and you can lose all important data.