You have not installed the latest updates. Wait until the scan is completed, and then you can open your Outlook to check if the problem is resolved.This problem occurs for one or more of the following reasons: Just type sfc /scannow in Command Prompt and press Enter. The corrupted system files can also lead to this error, but you can fix it by performing SFC scan. Step 4: Go back to the first window and select the new username, and then locate Full control in Permissions for SYSTEM and check it in Allow column. After entering the username, click Check Names to see if the mane is valid. Step 3: Click Add in the new window and there will be another window for you to select users or groups. Step 2: Switch to Security tab and check if your username is available in Group or user names. ost file in Outlook folder mentioned in Solution 5, and right click it and choose Properties. If you don’t have permissions to access this file, you might fail to open your Outlook. ost file according to different types of accounts. Outlook saves your information either in a. Solution 6: Check If You Have Permissions to Access Your PST or OST File Note: Please feel free to perform this operation, as the deleted files will be recreated automatically after you start Outlook.

Navigate to Micosoft > Outlook and delete Outlook.

Search %localappdata% in Cortana and click it to open the Local folder of App Data.

Make sure that your Outlook is completely closed.

Solution 5: Delete Outlook App Data Folderĭeleting Outlook App Data folder is another method to fix Outlook not opening. This command can remove all customization related to navigation pane, and might fix this Outlook error. You can search outlook.exe /resetnavpane in your Cortana and click the result to run this command. If Outlook won’t open and “cannot open the Outlook window” message shows, chances are that the Folder Pane or Navigation Pane corrupts.

Solution 4: Use The /Resetnavpane Command After that, the problem should be removed. Step 3: If any errors are found, click Repair. Step 2: Click Browse and select your Outlook data file. Step 1: Search SCANPST.EXE in This PC and double-click it to run Microsoft Outlook Inbox Repair Tool. It’s a wise method to repair the data file. Sometimes, the corrupted Outlook data file should be responsible for this problem.

Solution 3: Use SCANPST.EXE to Repair Your Outlook Data File

Now start Outlook and choose this new profile. Step 4: Select Prompt for a profile to be used and click OK. After the new profile is created, click Finish. Enter you name, email and password in the pop-up dialog, and click Next. Step 3: Click Add and enter the name of the now profile, and click OK. Step 2: In the Mail Setup, click Show Profiles. Step 1: Open Control Panel and select Mail. In this case, you can create a new profile to fix it. If your profile gets corrupted, you might experience that Outlook won’t open. Read More Solution 2: Create A New Profile

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