http://support.microsoft.com/kb/290301
Use the Windows Install Clean up to remove all previous existing Adobe version and try re-installing the 8.1.1 version.
Problems I faced -
- Internal Error+2753 AND Updater.api_NON_OPT message
- The installation that you are looking for exisits in a network location not accessible (this is if you have a office laptop and Adobe was installed from a network location)