Error: Internal error 2755 path\ArcGIS.msi
While installing ArcGIS, setup returns:
"Internal error 2755 <path>\ArcGIS.msi"
A system variable may contain an empty value.
Solution or Workaround
Ensure all system environment variables point to a valid location; none are empty. If any empty variables exist, delete them or set them to valid values.
For help with setting a system environment variable, see: How To: Edit an environment variable.