Annoying "could not find a "psql" to execute" message

Whenever I enter 'psql', I keep getting these "could not find a "psql" to
execute" messages and then it proceeds to exec the psql program.  If I enter
'psql' by itself, I will get this message twice before continuing the psql
program.

This is on a Windows machine. Note, this doesn't happen, if I execute in the
actual 'bin' directory.

Any suggestion on how to remedy this?

Thanks, J