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I had the same problem when moving files and folders to my SSD after a re install of the OS. I went into the Path of Exile folder which can be found like so: "C:\Users\Liam\Grinding Gear Games\Path of Exile\Redist" And in the Redist folder then is a dxsetup application which will install/ fix the direct X file :) Hope This works for you :)
Thank you, saved the day ;)