Install Windows

Installing GAUSS 15 for Windows

Run the installer

The first step is to run the GAUSS installer. To run the installer, browse to the location where the GAUSS installer was downloaded. The downloaded file should be named either or Double-click on the zip file and you should see the GAUSS Windows Installer File. Double-click on this file to begin the installation. Follow the installer's instructions to complete the installation.

NOTE: GAUSS 15 must be installed in a location in which the user has read and write privileges. Right mouse click on the GAUSS installer file and select 'Run as Administrator' to ensure proper permissions.

Request your permanent license

At the end of the installation process, if you do not already have a permanent license on your machine, notepad will open a file named myhostid.txt.

myhostid.txt file

To request your GAUSS license, fill out this form. The final line of myhostid.txt contains the hostid of your computer which you will need for your license request. If you have already closed Notepad, you will find the myhostid.txt file in your GAUSS installation directory. If the host id number is blank, click here.

Floating Network License

Continue with these instructions.

Single User License


To run GAUSS, either click on the desktop icon, or the start menu shortcut. GAUSS comes with a temporary license that allows you to run GAUSS for a few days, so that you do not have to wait for your permanent license to begin using GAUSS.

Install your permanent license: Single User License

When you receive your permanent license, simply place it in the directory in which GAUSS 15 is installed. The default location is: C:\gauss15. To confirm that your license file is installed correctly, start GAUSS and from the main application menu bar select Help->About GAUSS.

license type field

The license type field will tell you if you are using a permanent or temporary license.


1. Problem: When I try to run GAUSS, I get a dialog window that says "GAUSS Initialize failed: Error Code: 491".

Answer: This means that your temporary license has expired and GAUSS cannot locate your permanent license. Browse to your GAUSS installation directory ( C:\gauss15 by default) and check to see if you have a license file in that directory other than the temporary license. GAUSS license files end with a .lic extension.

If you have received your permanent license and cannot find it in the GAUSS installation directory, copy it there now and restart GAUSS.

For further assistance on this issue, please check out our User Forum: Single User License Troubleshooting

2. Problem: When I try to install GAUSS it crashes and I can't install it.

Answer: Sometimes permission issues in Windows can cause GAUSS to crash during installation. Make sure that you have the necessary permissions by installing as "Administrator" (right click on the *.msi installer). Additionally, during the installation process, there is a box that says "Install for Everyone". Please check that box.