Outlook cannot operate normally, and a no response message appears

Dear @Parker Ellie

I am sorry to hear that you are experiencing this issue with Outlook freezing and displaying "Not Responding." This behavior usually occurs due to a conflicting add-in, a corrupted Outlook profile, or background processes getting stuck.

Please follow these step-by-step troubleshooting methods to resolve the issue:

Step 1: Open Outlook in Safe Mode

Starting Outlook in Safe Mode runs the application without loading third-party add-ins, which helps isolate the cause.

• Press the Windows Key + R on your keyboard to open the Run dialog box.
• Type outlook.exe /safe and press Enter (or click OK).
• If prompted, select your default profile and click OK.

If Outlook opens and works normally in Safe Mode: The issue is likely caused by a faulty add-in. Go to File > Options > Add-ins. At the bottom, ensure Manage is set to COM Add-ins, click Go, uncheck all listed add-ins, and click OK. Restart Outlook normally and re-enable add-ins one by one to identify the problematic one.

If Outlook still freezes in Safe Mode: Proceed to Step 2.

Step 2: Force-Close Stuck Outlook Processes

Sometimes an Outlook process remains running in the background and causes new windows to crash.

• Press Ctrl + Shift + Esc to open Task Manager.
• Under the Processes tab, look for any instances of Microsoft Outlook.
• Select each instance and click End Task.
• Relaunch Outlook to check if it opens properly.

Step 3: Run an Office Quick Repair

Corrupted Office installation files can cause Outlook to crash.

• Press Windows Key + R, type appwiz.cpl, and press Enter.
• Locate Microsoft 365 Apps (or Microsoft Office) in the list.
• Right-click it and select Change.
• Select Quick Repair, then click Repair and follow the on-screen prompts.

Step 4: Create a New Outlook Profile

If your existing profile configuration is damaged, creating a fresh profile will fix the crash without losing your data on the server.

• Press Windows Key + R, type control, and press Enter to open Control Panel.
• Search for Mail in the top-right search box and open it.
• Click Show Profiles, then click Add....
• Enter a name for the new profile (e.g., OutlookTest), configure your email account, and complete the wizard.
• Under When starting Microsoft Outlook, use this profile, select your new profile and click Apply > OK.
• Launch Outlook.

For official documentation on this issue, you can refer to Microsoft's guide: Outlook crashes or stops responding when launched.

Please let me know how it goes or if you need further assistance.

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