Troubleshoot the Set of Folders Cannot Be Opened Error in Outlook

Troubleshooting Cannot Start MS Outlook and Set of Folders Can’t be Opened Error

You can try the following methods and any method can fix your problem. There are possible chances that your Outlook Account is not up to the mark and therefore you are unable to start it.

Run Outlook in Safe Mode

It is one of the best methods to fix this issue. The user must start Outlook in safe mode because this avoids plug-ins and it is possible that plug-ins are conflicting the smooth working of MS Outlook.

• Press Window + R and start Run Command.
• Type Outlook/Safe and Press OK.

• Enter the User’s name in the Choose Profile Dialogue Box.
• Provide Outlook Credentials if it compels you to enter.

If the Outlook application is runs successfully then there is a problem with your Add-ins so you must disable all the add-ins.

Disable Add-ins

• Open Options in the File Tab and then Click on Add-ins.
• In the Manage Box Select COM Add-ins and then click on OK
• The List of add-ins will appear. Unmark all the add-ins and click on OK.

Configure Outlook Navigation Pane

The navigation pane holds Outlook database folders like Contacts, Calendars, Tasks, and other items. When you configure navigation pane and Reset it, then all the settings which were customized are set to default. So the customized setting might be the reason for this issue.

• Press Windows + R and open Run Command.
• Enter the Command resetnavpane.
• Now, close Outlook application and all the related applications.
• Then, open the Run command again and enter exe /resetnavpane.

• Click on OK button and run the command.

Now see whether The Set of Folders Cannot be opened error has been resolved or not.

Disable Compatibility Mode

• Make a Right-Click on MS Outlook Application and open Properties.
• Go to the Compatibility Tab and Unmark Run this program in compatibility mode.
• Check Run this Program as an Administrator and click on Apply.
• After all the confirmation click on OK and close properties.

Enable Cache Mode

• Open Control Panel from the Start
• Click on Mails and then Select Email Accounts.
• Select the Outlook Account which is facing error and click on Change.
• Open Offline Setting Option and mark the Use Cached Exchange Mode.

Once you enable the cache mode, I hope you’ll not face any kind of error.

Create a New Outlook Profile

• Go to Start Menu and Open Control Panel.
• Click on Mail and Select Show Profiles in the Mail Setup Wizard.
• Now, Click on Add and provide the details of New Account in the Auto Account Setup
• Once you create the Account click on that account under Always use this profile

Now launch MS Outlook with the new account and I hope your set of folder can’t be opened error would be resolved.

Repair PST files via ScanPST.exe

If all the above method are not successful and still you are facing the error then there is some problem with the PST files of MS Outlook. You can try the inbuilt utility of Microsoft known as Inbox Repair Tool. In order to repair the files you must follow the steps given below:-

Location of Inbox Repair Tool in Outlook 2016- C:\Program Files (x86)\Microsoft Office\root\Office16

• Launch ScanPST.exe into your computer system.
• Browse the PST file which you want to repair and click on Start.

• After the completion of the Scanning Process Click on Repair.
• Select Make a backup of scanned file before repairing option if you want to backup PST files.

This method will repair your Outlook PST file and will fix Cannot Start MS Outlook error. If this method also fails then you have to bear some expenses and have to buy a Professional Outlook PST Repair Tool. A third-party application can only resolve your error therefor PST Recovery Software would be the best option.

Winding Up

I have discussed the various methods to resolve your query. You can try all of them because any method can fix your error. The exact reason for this error is some corruption issues with your PST file. So I have also mentioned a professional tool through which you can fix the set of folders cannot be opened error. I hope my blog has helped you.

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About The Author:

Simran Bhatia

Simran Bhatia is a technical content writer engaged in writing clear, concise, and SEO-optimized content. With a background in computer science and a passion for writing, I thrive to deliver complex technical content in simple layman terms.