Instructions can be found here.

Are you installing on Rhino 6 or 7?

Please make sure you have the Bongo 2.0 SR8 installer.

Run the Command Prompt as an administrator.

The command used should be:
msiexec.exe /i C:\FileDirectoryAndMsiNameHere /qb ALLUSERS=1 WORKGROUP_NODE=1 ZOO_SERVER=IpAddressHere USERNAME=NameOfUserHere COMPANYNAME=Company

Are you installing on Rhino 5?

For Bongo 2, please follow the same instructions that's for Rhino 5.

With the exception that the install directory will be the following:

32-bit Bongo

INSTALLDIR="C:\Program Files (x86)\Bongo 2.0"

64-bit Bongo

INSTALLDIR="C:\Program Files\Bongo 2.0 (64-bit)"

For example:

To install Bongo 2 32-bit with English language support as a stand-alone license using the License Key “AAAABBBBCCCCDDDDEEEE”, run:

msiexec.exe /i"D:\Installers\setup_x86_en-us.msi" INSTALLDIR="C:\Program Files (x86)\Bongo 2.0" RMA_CDKEY=AAAABBBBCCCCDDDDEEEE INSTALL_EN=1