OUTLOOK PROBLEMS

Question

MY OUTLOOK DOESNT WANNA LOGIN IT SAYS THERES AN ERROR AND WHEN I TRIED OPENING IT AGAIN IT SAYS DIALOGUE IS OPEN

Answer 1

Use the following steps in order, checking Outlook after each step:

1. Close all Outlook dialogs and processes
   • Press Ctrl+Shift+Esc to open Task Manager.
   • On the Processes tab, end any process named Outlook or Microsoft Outlook.
   • Try opening Outlook again.
2. Start Outlook in safe mode
   • Press Windows+R.
   • Type:
     • outlook.exe /safe
   • Press Enter.
   • If Outlook opens in safe mode, a faulty add‑in or profile is likely involved.
3. Create and use a new Outlook profile
   • Outlook profiles can become corrupted and prevent sign‑in or opening.
   • Follow the steps in "Create an Outlook profile" to create a new profile, then:
     1. Restart Outlook.
     2. In the Choose Profile dialog box, select the new profile.
     3. Select OK.
   • If Outlook works with the new profile, the old profile is corrupt. Before removing the old profile, back up any data files because offline cached content is deleted when a profile is removed. See "Introduction to Outlook Data Files (.pst and .ost)" in the same article.
4. Repair Outlook data files
   • If Outlook still will not open or log in, run the Inbox Repair Tool (scanpst.exe) to fix corrupted data files.
   • Close Outlook, then follow the steps in "Repair Outlook Data Files (.pst and .ost)" to scan and repair the files.
5. If Outlook still cannot log in
   • If this is an Outlook for Microsoft 365 business account and sign‑in or mailbox connection problems continue, use the automated troubleshooter described in "Fix Outlook account problems in Office 365 for business" by signing in with the business account at the provided support page.

If none of these steps help and Outlook continues to report a dialog is open or fails to log in, reinstalling Office 365 (for classic Outlook) or removing and re‑adding the account in the new Outlook app, as shown in the Q&A examples, can also resolve stubborn profile or app issues.

---

References:

• I can’t start Microsoft Outlook or receive the error “Cannot start Microsoft Outlook. Cannot open the Outlook Window”
• Fix Outlook account problems in Office 365 for business
• Cant get into outlook - Microsoft Q&A
• What to do when Outlook will not open on my PC? - Microsoft Q&A
• Detected a problem launching new Outlook - Microsoft Q&A
• How to fix the issue with MS Office asking you to log in every time you open an Office app - Microsoft Q&A