Install Exchange 2010 Service Pack 2 Error

Server Administration

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:

    1. Open regedit.
    2. Navigate to HKLM\Software\Microsoft\Exchangeserver\v14. Under the appropriate role (depending on your setup, it could be AdminTools, MailboxRole, or ClientAccessRole).
    3. Delete the watermark and action keys.