Why Splunk installation fails with Exitcode='4' " wrong privileges" ?

[mzorzi]

My Splunk Installation failed with the error

<<
Splunk Installer was unable to start Splunk Services.

Please make sure you have provided the correct username
and/or password, and the user you are trying to run Splunk as
has the correct privileges. Exitcode='4' >>

After that the installation is rolled back. We double checked the permission and run the installation as local Administrator, still not chances

[mzorzi]

It is not at all a permission problem as the error suggests. The service fails to start with error " Error 193 oxc1" which is described in: http://support.microsoft.com/default.aspx?scid=kb;en-us;Q325680 .

The problem was caused by the presence of a file called C:\Program ; once removed the installation runs like a charm