User OS to intall the Oracle (owner)

hello

its windows server 2003

how to find the user owner to install the oracle

on linux ps -fea | grep pmon

$ps -fea| grep pmon
  oracle  2950     1   0   Sep 13 ?         262:19 ora_pmon_db1
  oracle   741 19102   0 17:32:47 pts/5       0:00 grep pmon:confused:

the user its oracle.

but on windows what its the comand o instruction to finding.

thanks a lot