If you are trying to install Graphical Analysis/Spectral Analysis/Instrumental Analysis to a single computer, we recommend the regular installer, which is free at:
https://www.vernier.com/products/graphical-analysis/free/
https://www.vernier.com/product/spectral-analysis/
https://www.vernier.com/product/instrumental-analysis/

If you are an IT professional at a school and want to install these applications to a large number of Windows computers managed using tools like Group Policy or SCCM, read below:

Download the silent installer (MSI) for Graphical Analysis.
Download the silent installer (MSI) for Spectral Analysis.
Download the silent installer (MSI) for Instrumental Analysis.

Notes:

You also need to install the 2017 Microsoft Visual C x86 redistributable in order to run these applications. That installer is included in the zip file and can be installed silently with “vc_redist.x86.exe /q”.

On Windows 7 you must install KB2921916. See
Issues with the silent installer with Logger Pro on Windows 7

See also
I get a Javascript error when I try to run Graphical Analysis on Windows.
Is there a way to activate Graphical Analysis Pro at install time?