If you cannot open your Outlook data file or suspect that the file is damaged, use the Inbox Repair tool (scanpst.exe) to repair errors in the file.

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Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

To repair the corrupted files manually, view details of the System File Checker process to find the corrupted file, and then manually replace the corrupted file with a known good copy of the file. Open an elevated command prompt, as described previously.

Use this tool to find and remove specific prevalent threats and reverse the changes that they made (see Covered malware families). For comprehensive malware detection and removal, consider using Windows Defender Offline or Microsoft Safety Scanner.

These suggestions are possible matches from a list of names and email addresses from the email messages that you have sent. The method to copy your AutoComplete list from one computer to another depends on what type of email account you've added to Outlook.

In Windows, a CD or DVD drive may not appear in File Explorer and may show a yellow exclamation point in Device Manager. This issue usually indicates a driver or configuration problem, and an error code may appear in the device’s Properties under Device status.

Use the classic Outlook startup troubleshooter to diagnose and fix several common classic Outlook for Windows issues for you. Select the button below to start the classic Outlook startup troubleshooter. You need to be on Windows 10 or higher to run the troubleshooter.

Learn how to uninstall Office from a PC using the Control Panel or with the uninstall support tool.

You can run the Inbox Repair Tool (scanpst.exe) to scan your Outlook data files and repair errors. For information on how to run the Inbox Repair Tool, go to Repair Outlook data files (.pst and .ost).