If disabling the antivirus resolves the issue, consider using built-in Windows Defender as it is less likely to cause conflicts. Your trusted tech help & troubleshooting hub. If the error occurs during a Windows update, the Windows Troubleshooter can help identify and fix the problem.

• If none of the above fixes work, the problem may be caused by deeper corruption or server-side issues.
• In that case, it’s best to contact Microsoft Support or your IT administrator.
• If the error occurs during a Windows update, the Windows Troubleshooter can help identify and fix the problem.

Fix 1: Run Outlook as Administrator

Now, let’s look at how to fix these issues step by step. If none of the above fixes work, the problem may be caused by deeper corruption or server-side issues. Repair Office 365 installation errors In that case, it’s best to contact Microsoft Support or your IT administrator.