{section: How to configure MPI on Windows}

Known to work with Condor version: 7.5

{subsection:Installation}

Download a copy of MPICH2 from the Argonne site:

* http://www.mcs.anl.gov/research/projects/mpich2/downloads/tarballs/1.2.1/mpich2-1.2.1-win-ia32.msi

During the install, make sure to enable use of the tools by all users, and not just yourself.
Once the installation is compleate, ensure that the MPICH pass phrase is the same on all machines in the pool:

{code}
Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\MPICH\SMPD]
"phrase"="behappy"

{endcode}

The final step is to disble the SMPD service.  Using the Microsoft Managment Console, open the Services Common Console Document.  Find the entry labled "MPICH2 Process Manager, Argonne National Lab" and modify it's properties such that it is not running and it's start-up is disabled.