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**How to Fix MS Outlook Not Opening in Windows OS? Solution** Are you having problems opening Outlook? You may also be seeing errors such as "Cannot open Microsoft Office Outlook" or "Can’t open Outlook Window again and again." Outlook doesn't allow you to open errors, so there is no reason to be discouraged. This article might help you. This article will help you identify and fix many errors. We need to first understand what is happening and what version of Outlook it is. We might then go over the issues you are experiencing. Let's look at a few solutions that can help us troubleshoot our real problems: **[Outlook Won’t Open In Window](https://assistme360.com/outlook-wont-open/)**. **1. Start Outlook in Safe Mode & Disable Add-ins.** Outlook may not open due to add-ins. Outlook can be started in safe mode to avoid add-ins. This will allow you to determine if the add-in is a problem. ***Get Outlook started in:*** * To start the run command, click Window + R. * Press OK and type Outlook/safe. * Select the Choose Profile dialogue box and accept the default Outlook setting. Click OK. * If prompted, then enter the password and choose your account. If Outlook starts in safe mode but does not open, it is most likely that one of your Add-ins is causing the problem. In this case, we will need to disable Add-ins before you can restart your Outlook 2019. ***Remove Add-ins*** * Select File >> Option >> Add ons * Check that the Manage box in View & Manage Office Add Ins is set to COM Addins, and then click GO. * Before you disable Add-ins, take Screen-shots. * After capturing the Add-in titles, remove all check-boxes from the COM Add Ins list. * "Click on Remove." * Select File > Exit. **2. Create a New Profile** Outlook may not open due to problems with your profile. Sometimes your profile can become corrupted and contain your account settings. It is possible to determine if it has been corrupted by creating a new profile, and then changing the default program that opens with Outlook. * Click Start >> Control Panel to open it. * Use Mail * Choose "Show Profile" >> Add it to the Mail Set-up * Click OK to add a new name to your profile. * Follow the prompts to create a new email account and profile. * Click Finish. * Restart Outlook * Click File >> Account Settings >> Select Change Profile from the drop-down menu. * Restart Outlook. * Click OK to choose the name of your new profile. **3. Repair Outlook** Outlook may not open sometimes because the Outlook application is damaged. You can then use the built-in Microsoft utility to fix it. Close all Microsoft Applications first. * Type apps and features into the Window search box. Select it. * In the list of installed apps and features, click on Microsoft Office. * Click on the Modify button. * If asked for permission, type Yes. * Click on Online Repair and press the Repair/strong> button. ***After the repair is complete, restart Outlook.*** **4. Reset the Navigation Pane** Outlook may not open correctly if it encounters problems while opening the navigation pane. Outlook can be prevented from opening correctly if it is stuck at loading or cannot open the navigation pane. Outlook might get stuck while loading or not be able to open the Outlook window when it starts up. The issue could be resolved by setting the navigation pane to "default". * By pressing Window+R, you can open the Run command. * Type Outlook.exe/resetnavpane in the open box & click on it. * When processing is completed, open Outlook. **5. Repair Outlook Data Files** Outlook PST files can cause Outlook to stop opening. To fix the problem, you can use the Inbox Repair Tool (ScanPST.exe). The following address will allow you to locate ScanPST.exe:- **Outlook: C:\Program Files (x86)\Microsoft Office\root\Office16** ***After that*** * Open ScanPST.exe * You can repair your Outlook PST by going to Outlook PST Repair. * To begin the scan, click Start. * If the scan detects an error, click on the Repair button. * When the repair is completed, start Outlook. If a PST file has been severely damaged, it may take several scans to locate the errors. Sometimes, deleted items can make it impossible to recover them. This is where a stronger tool may be needed. Visit on **[Assist Me 360](https://assistme360.com/)**.