Windows Installer pops up on Build

I'm using VB.Net 2002 on a W2K machine. When I go to build a project in Release mode, the build starts but then the Windows Installer pops up and starts to configure VS.Net. It usually tries three times, although sometimes when I catch the Cancel button at the right time it only tries once. Then the build continues fine.
I've noticed this in other MS products, especially Office, with different machines and different users. It doesn't seem to help if I have the install CDs in the drive.
This is annoying. Does anyone know the fix for this? Thanks.