3.0.5 upgrade on iPC

I am trying to upgrade my iPC with 3.0.5, and keep getting an error about being unable to create a temporary file (Got this when installing from within H3PC). I tried again from the iPC control panel, then it said it was unable to write some scen help file and to retry or cancel. Then tried downloading the H3pc file again and load from a USB key, and same error. Downloaded the latest xpe image, but that seems to only have 3.0.4.

Any thoughts?
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