In Exchange 2010, you get an error
Setup previously failed while performing the action Install. You can resume setup by performing the action “BuildToBuildUpgrade.”
To fix this, do the following:
- Open regedit.
- Navigate to HKLM\Software\Microsoft\Exchangeserver\v14. Under the appropriate role (depending on your setup, it could be AdminTools, MailboxRole, or ClientAccessRole).
- Delete the watermark and action keys.