5070 extended client labeled "powerterm"

Hello, 

I got some of the 5070 clients off of ebay - some are labeled "pcoip optimized" some are "powerterm" - all came with windows10 - i can re-image the "pciop optimized" with thinOS but the ones labeled "powerterm" return "error while validating security key. error 233" is it possible to reimage these clients with ThinOS?

Thanks!