Add Outlook: How to repair corrupted PST and OST files

Aisha Spina 2026-01-12 13:32:08 +08:00
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Outlook stores all your email messages, meetings and events, contacts, and tasks in data files. You can run the Inbox Repair Tool (scanpst.exe) to scan your Outlook data files and repair errors. Outlook caches various files to speed up your app experience. When you have issues with the app, its likely the apps cached files are corrupted.
You may notice that All, Unread , Mentioned and other sort and filtering options, such as By date, and Newest are missing in Outlook above your email list. Please install the Windows 10 Fall Creators Update to fix this issue. Outlook 2016 freezes when you try to preview an Excel file that's attached to an email. After updating Office, you may experience a brief flashing window every hour, which triggers the OfficeBackgroundHandlerRegistration task to start Outlook Fix Blog running. For more information about when builds are available for their respective channels, go to Update history for Microsoft 365.
If you're still unable to send or receive email, read how to Fix Outlook.com email sync issues. Some customers may experience a delay when trying to create a new email address, or alias, for their Outlook.com account. None of the events or information was lost in the move to the new calendar.
On deciding which content you want to save, set the desired Outlook Fix Blog path on your device. While handling it, you might have accidentally changed some unwanted settings. There is another situation where your application's cache may be full. For both conditions, you have to access your Outlook settings and make appropriate changes to repair Outlook Mac. The issue can be related to the application if your Mac is updated. You will record such problems if you have not updated it regularly and have a pending update.
It is therefore crucial that these Outlook errors are resolved as soon as possible. This guide discusses methods to quickly fix the Outlook not opening issue in Windows 10. To repair the PST files, you can use the in-built tool ScanPST, which is provided by Microsoft, but it repairs minor corruptions and files up to 2GB only. So you can opt for an automated solution Kernel for Outlook PST Repair.
These troubleshooting techniques apply to Outlook 2016 and 2011 for Mac. Try these troubleshooting steps in the order presented here, from simple [Outlook Fix Blog](https://office365emailfix.blogspot.com/2025/10/fix-outlook-not-sending-or-receiving.html) to more complicated. If you're trying to open Microsoft Outlook from your Start menu or a shortcut icon but it just won't launch, don't worry, there are a few things you can try to get it up and running again. Here are some common fixes that should work when Outlook doesn't open, whether you're using Windows or a Mac. With the help of these tips, you can fix the Outlook is Running Slow problem.
If the issue is more complex than updating Outlook for your Mac, you need to go for other techniques. There is a chance that the problem may have been generated due to settings issues of your tool. To resolve this, it is best to delete the Outlook preference files on your Mac. First, you need to determine the type of data file Outlook is using (pst/ost).You can look in the default location, or use Outlook to help you find it. The above-mentioned steps would help to repair Outlook 2016 if there is any functional issue with the application.
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. When you start Windows normally, several applications and services start automatically and then run in the background.
In this case, you can reset your view settings before opening the Outlook Fix Blog app. Select your Microsoft Office installation on the list and choose "Change" at the top. In this case, open Outlook in safe mode where your add-ins arent loaded and remove any suspicious add-ins. In most cases, Outlook doesnt tell you why it isnt opening, which leaves you guessing as to what has caused the issue. Due to underlying system or PST issues, Outlook may crash, freeze, or not function properly. Find solutions to common problems or get help from a support agent.
Outlook stores all your email messages, meetings and events, contacts, and tasks in data files. These files occasionally might become corrupted. You can run the Inbox Repair Tool (scanpst.exe) to scan your Outlook data files and repair errors. Over the last couple of weeks it will not open normally (not even in safe mode) and I am having to do the windows repair option in settings. I have also tried the Classic Outlook Profile Set Up Troubleshooter.
Are you having trouble starting Outlook or receiving "Cannot start Microsoft Outlook. Cannot open the Outlook window" error messages? We can fix the problem for you, or you can use the troubleshooting steps we're providing below to help resolve these startup issues. Here's the deal, when Outlook manages to open, all the files you delete will automatically be recreated. It gets better because you also resolve all the Outlook Fix Blog Outlook opening issues. If the in-box Program cannot fix the corrupted Outlook PST files, you can also try Wondershare Repairit for Email.