I have reinstalled Microsoft Office 365 as the 32-bit version to use Outlook Classic but the app doesn't start

Donald Shapiro 0 Reputation points
2026-10-02T20:05:58.79+00:00

I have reinstalled Microsoft Office 365 as the 32-bit version to use Outlook Classic but the app doesn't start. I uninstalled Microsoft 365 twice and reinstalled twice, restarted my laptop, but the Outlook Classic version will not start. New Outlook does start but I need to open .pst files. Does anyone have a solution to this issue? Thanks.

Outlook | Windows | Classic Outlook for Windows | For home
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  1. Ivan B 125K Reputation points Independent Advisor
    2026-10-02T20:42:20.3533333+00:00

    Hi,

    Have you tried opening the classic version of Outlook in Safe Mode?

    Try this: type outlook /safe into the Windows search bar and see if Outlook opens.

    Thanks.

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