Do you have "system restore" on your Windows computer? If so that might be a good option if you have a restore date previous to your installation of the new BiaB.
It's too late for this advice, but not for the future....
Before installing any new program, I back up my computer making a "disk image" on a USB drive using Norton Ghost (other imaging programs will do this). That way if the new program does anything to my computer that I don't like, and if System Restore fails, I can return my computer to a previous state. It has saved my @$$ quite a few times in the past.
Even though my last name is Norton, I have no connection whatsoever to Norton Ghost or any other Symantec products (unfortunately)

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