Hi, new here. Needing help with Vista Ultimate, I had installed a realestate program called Agent Office successfully, my client attempted an online upgrade to a new version and it blew up the new/old agent office installation. I did the uninstall from windows of the apps, even used perfect uninstaller and removed all remnants, upon attempting to install started to get the 1607 Install Shield Scripting runtime error, googled and tried numerous fixes. As of now I have UAC Disabled, recreated windows temp, copied the installation to the x86 programs folder and tried to install from there, verified permissions and now when I try to install it I'm getting Invalid Program/System Directory error and still cannot install. Any suggestions appreciated, this is driving me nuts and I am ready to do a factory restore.