Win32 Question about the right level for the account that PostgreSQL is installed under...

Sorry to be such a pest. Since an administrator will get this error:

creating template1 database in u:/msys/1.0/local/pgsql/data/base/1 ...
execution of PostgreSQL by a user with administrative permissions is not
permitted.
The server must be started under an unprivileged user ID to prevent
possible system security compromise. See the documentation for
more information on how to properly start the server.
child process was terminated by signal 1
initdb.exe: failed

What is the highest safe level to do the installation under Win32?