Suspended MSI

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Have you ever noticed or seen a suspended MSI? When installing a new app via MSI, it will basically ask you to rollback a previous installation before continuing a new MSI installation—which can be a real pain. To NOT rollback, do this:

REG DELETE HKLM\Software\Microsoft\Windows\CurrentVersion\Installer\InProgress

or

Run MSIZap.exe

Delete the InProgress information:
msizap.exe p

Delete the rollback information:
msizap.exe s