Hi K B T 86,
Thanks for the answer, but this is a solution for just one Desktop.
I'll try to deploy Windows 7 with Microsft MDT for multiple desktops and notebooks with a Skylake architecture.
Regarding this article: http://www8.hp.com/us/en/ad/windows-10/win7supporteddevices.html
HP still supports Windows 7 on Skylake till july 2017
It is an answer but not the answer I am looking for, so half a thumb ;-)