Thanks MCA for your suggestions.

I tried running the revised script, and it still didn't work. Could it be the version of KIX that I'm running? I am running 3.62. I tried upgrading to 2001 but for some reason, KIX would still be running in the background after the script executed.

I also modified the script to:

SHELL "%comspec% /e:2048 /c \\test02dc\inclient$\Setup.exe -s -f1 setup.iss"

That is the true location of the file, the previous was just a shortcut.