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GAMESS Installation on 64-Bit
Microsoft Windows Operating Systems
This guide provides step-by-step instructions for downloading the files needed to install the 64-bit native GAMESS binary on a 64-bit Microsoft Windows operating system.
Step 1: Please ensure that all High Priority updates for the operating system are installed

The following three files will be downloaded and installed:
1) Microsoft Visual C++ 2010 Redistributable Package (x64)
• This will install the Windows libraries that are needed for the GAMESS binary
2) HPC Pack 2008 R2 MS-MPI Redistributable Package with Service Pack 1
• Communication protocol used for both serial and parallel runs
3) GAMESS for Microsoft Windows 64-Bit
• The native Windows binary of GAMESS built using the Portland Group (PGI) compilers

Microsoft Visual C++ 2010 Redistributable Package (x64)
1) The Microsoft Visual C++ 2010 Redistributable Package (x64) can be obtained from the following link: http://www.microsoft.com/downloads/en/details.aspx?familyid=ba9257ca-337f-4b40-8c14-157cfdffee4e It can also be found by searching for “Microsoft Visual C++ 2010 Redistributable Package (x64)”
Download the following file: vcredist_x64.exe

2) Double-click on the vscredist_x64.exe file to install the Microsoft Visual C++ 2010 Redistributable Package
(x64)
3) Click on Install then click on Finish after the installation is complete

HPC Pack 2008 R2 MS-MPI Redistributable Package with
Service Pack 1
1) The HPC Pack 2008 R2 MS-MPI Redistributable Package with Service Pack 1 can be obtained from the following link: http://www.microsoft.com/downloads/en/details.aspx?FamilyID=ce888449-0e71-44f3-a2fc-947ec57ff90f It can also be found by searching for “HPC Pack 2008 R2 MS-MPI Redistributable Package with Service Pack 1”
Download the following files: mpi_x64.msi and redist.txt

2) Double-click on the mpi_x64.msi file to install the HPC Pack 2008 R2 MS-MPI Redistributable Package with
Service Pack 1

3) Click