MDT 2013 error on P4 machines

I am getting an error when I try and refresh a 64bit deployment on Optiplex GX620 pcs.

This seems to only be an issue with the 64bit boot wim, but I'm just wondering if there is a way around this?

Or at least knowing definitely what the reason is (aside from P4s being closer to the age of dinosaurs than the present day)