The minor upgrade for our product created with InstallShield 2008 installs on Win XP perfectly, but fails on Windows 7 32 bit and 64 bit. It prompts for the admin privilege and after that, although it appears like it has finished installing (it even says "Installation finished successfully"), the old DLLs are not replaced.
There are about 15 DLLs that must have new product code.
I am completely at sea here. I have no previous experience with InstallShield but am assigned this job due to resource constraints at our company.