Outlook Mail

Can you please take a screenshot of the problem that you are getting?

And are you using Outlook New or Classic?

No errors. It just doesn't show any messages.

I'm using the free version. Is it not free anymore?

No error. It just doesn't show any messages. Even in Junk.

Hi! Let me help you.

May I know the error that you get when you open Outlook?

Several recent issues can cause classic Outlook for Windows to suddenly stop working, hang, or freeze. Use these targeted checks and fixes:

1. Check if Outlook is just busy

• Look at the status bar at the bottom of Outlook.
• If it shows actions like deleting/moving many items or sending/receiving large mail, Outlook may appear frozen but is still working.
• Wait a few minutes to see if it finishes.

2. Check for hidden dialog boxes

• Press Alt + Tab to cycle through open windows.
• If a confirmation dialog (for example, for reminders or other actions) is open behind Outlook, respond to it so Outlook can continue.

3. Start Outlook in Safe Mode This helps rule out add-in or extension problems.

• Close Outlook.
• On Windows 10 or 11: select Start, type Outlook.exe /safe, then press Enter.
• If Outlook opens and works in Safe Mode, an add-in or customization is likely causing the issue.
• Close Outlook and reopen normally to test again.

4. Repair Outlook data files If data files are corrupted, Outlook can hang or stop responding.

• Close Outlook.
• Run the Inbox Repair Tool (Scanpst.exe) and follow the steps in Repair Outlook data files (.pst and .ost).

5. Create and test with a new Outlook profile A corrupted profile can suddenly break Outlook.

• Follow Create an Outlook profile to create a new profile.
• Close Outlook.
• Hold Shift while starting Outlook.
• In Choose Profile, select the new profile and choose OK.
• If Outlook works with the new profile, the old one is corrupted.

6. Repair Office If Outlook program files are damaged, repairing Office can fix it.

• Close all Office apps.
• Open Control Panel → Programs and Features.
• Right-click Microsoft Office (Microsoft 365 Apps) → Repair.
• If available, try a Quick Repair first; if that fails, run an Online Repair.

7. Check for Windows and Office updates A recent update or a missing update can cause sudden issues.

• Install the latest Windows updates: see Install Windows Updates.
• Install the latest Microsoft 365/Office updates: see How to update Microsoft 365 or Office for Windows.

8. If using POP accounts and Outlook started freezing after a Windows 11 update There is a known bug affecting classic Outlook POP profiles after the Windows 11 January 2026 update KB5074109.

• Temporary fix: uninstall the KB5074109 update via Settings → Windows Update → Update history → Uninstall updates, then remove that KB if present.
• This is specifically for the POP-account hang/freeze scenario described in the referenced article.

If Outlook still will not open at all after these steps, a full uninstall and reinstall of Microsoft 365/Office has resolved similar cases where repair and reset did not help.

References:

• Outlook for Windows not responding, hangs, freezes, or stops working
• Classic Outlook not responding, stuck at "Processing," stopped working, or freezes
• Outlook not responding error or Outlook freezes when you open a file or send mail
• Outlook Freezing and Not Responding and Not saving changes when ending the task - Microsoft Q&A
• Outlook keeps crashing - Microsoft Q&A
• What to do when Outlook will not open on my PC? - Microsoft Q&A