Microsoft Outlook is an excellent email client with many useful features. Outlook users sometimes have issues with the application. The “Cannot open Microsoft Outlook” error is one example. Outlook users often encounter the “Cannot open the Outlook Window” error. This error stops Outlook users from using the app.
How do I fix “Cannot start Microsoft Outlook” error?
These are the steps to fix the “cannot open Microsoft Outlook” error.
1. Run Outlook in Safe Mode
Outlook add-ins can enhance the user experience by providing certain features that aren’t available in the base application outlook the set of folders cannot be opened These add-ins can sometimes cause Outlook to stop working. This can lead to Outlook not opening properly.
To confirm that add-ins are the cause of the problem, you can run Outlook in safe mode. These are the steps:
- Start the Run tool by pressing Windows + R keys.
- Input Outlook /safe into the input field, and then press the OK button.
- Click OK to save your Outlook profile.
Outlook will not open if you can use it in safe mode. To fix the problem, you can disable add-ins. These are the steps to follow:
- Go to File > Options > Add ons.
- Select COM Add-ins from the Manage menu and click on the Go button.
- Click OK to save your Outlook profile.
Outlook will not open if you can use it in safe mode. To fix the problem, you can disable add-ins. These are the steps to follow:
- Go to File > Options > Add ons.
- Select COM Add-ins from the Manage menu and click on the Go button.
- Click OK in the COM Addins window.
- Start Outlook again and verify that the “cannot open Microsoft Outlook” problem is solved.
2. Reduce Outlook Data File Size
Outlook creates two types data files on the local computer: PST (for POP3 emails accounts) and OST [for MAPI/IMAP account accounts]. Outlook can have problems if your Outlook data file is too large.
You can reduce the size of your data files if you are experiencing the “can’t open Outlook” issue. There are many ways to do this. For instance, you can:
- Split Outlook data manually, or using a third-party PST splitter tool.
- Clear out the Deleted Items folder to remove any unimportant mail items.
- You can manually compact the data file.
- Archive your old emails in a new Outlook file.
3. Get the latest Outlook
Sometimes, the Outlook update can fix the “cannot open Outlook window” issue. Go to File > Office Account > Outlook Update > Update Options (Update Now).
4. Remove XML Files
Microsoft Outlook may not be able to start because of corrupt XML files. To fix the problem, you can delete these files. These steps will help you do this:
- To launch Run, press Windows + R keys.
- Enter appdata into the input field, and then press ENTER.
- Open the Appdata folder and go to Local > Microsoft > Outlook.
- Open Outlook as per your Outlook version. Outlook 2016 for instance has the folder called 16.
- Removing XML files is a good idea.
5. Reset Navigation Pane
Outlook lets users customize the navigation pane, which is the leftmost section of the main window. Sometimes customizations in Outlook’s navigation pane may prevent you from opening Outlook. To fix this problem, you can reset your navigation pane. These are the steps to follow:
- Close Outlook and all other Outlook applications.
- To launch the Run tool, press Windows + R keys.
- Type “outlook.exe/resetnavpane” in the Run window and hit ENTER.
6. Repair Outlook Data Files
Outlook data files can be corrupted or damaged by certain events. These include power failure, sudden system shutdowns, malware infections, and so on. Outlook might throw an error if your file is corrupted. To resolve this error, you can repair the file.
Microsoft’s Personal Storage Table file can be repaired using Inbox Reparator (ScanPST.exe). ScanPST can be found in Outlook’s installation directory. Once you have located the utility, launch ScanPST.exe. Then provide the path to your PST file. To repair the file, click on the Start button.
Inbox Repair Tool can fix minor corruptions in Outlook data files. Stellar Repair for Outlook is a more advanced PST repair tool that can fix severe corruption.
Stellar repair for Outlook is an effective PST repair tool. It offers the following features.
- Repairs of large and severely corrupt Outlook data files
- Complete PST mailbox recovery, including email, contacts, attachments and tasks.
- Splits and compacts Outlook data files in the Technician edition
- Export the repaired PST directly to Office 365 account (Technician Edition).
- Previews of the repaired mailbox before saving
- You can save the Outlook data file repaired in various file formats: PST, EML and RTF.
Conclusion
The error message “Cannot open Microsoft Outlook” Outlook cannot be opened One of the most common Outlook errors is “The set of folders could not be opened.” This error blocks you from accessing your mailbox. This error can be easily fixed by following the steps in this article. To fix an error caused by corrupt PST files, you can use ScanPST and a third-party Outlook Repair Tool.
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