Problem with install on iPC

I am having issues installing V3.0.0 (build 2417) from V2.6.0 (build 2071) The configuration panel upgrades fine but when installing Hog 3PC I get the following error "There is a problem with this windows installer package. A Script required for this install to complete could not be run. Contact your support personnel or package vendor"

XPe version is 7.9.

Any clues as to why this happening. I am installing from a 1GB memory stick and the installer package is the only file on it.
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