If Microsoft Outlook keeps crashing when opening a PST file, the most common reason is a corrupted or damaged PST file. This usually happens due to improper system shutdowns, malware infections, or large mailbox sizes. First, try restarting your system and opening Outlook in Safe Mode to disable unnecessary add-ins. If Outlook still crashes, rebuilding or repairing the PST file may help.

When the PST file is severely corrupted and manual fixes fail, repairing the file using the MailConverterTools Outlook PST Recovery Tool helps restore Outlook data and prevents Outlook from crashing while opening the PST file.
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