That depends upon what options you have set, and what "labview installers."
Are you installing LabVIEW, or have you created a VI in LabVIEW and made an installer for it?
Installing LabVIEW could also install NI-VISA --> which would over-ride Agilent VISA if it is also installed.
But rather than guessing, could you please tell us what kind of problems you are having?
Les Hammer