i continue trying for the right config. I ended using this config that worked on a VM what i use for testing. the Setup asks for a licence key and i manually enter the trial key so the setups continue. So on the VM this works all well. When i copy all the files on the bootable usb stick and want to install it on a Lenovo E73, it doesn't ask for a serial but the setup say's i can install just windows 8 (not the pro that i am slipstreaming and making unattended) So this leave's me confused. I am not formiliar with the ei.cfg, i'll try to figure that out now Thanks! it worked! i have used the attachemend of the previous post and i made a ei.cfg in the source map of the setup folder containing: [EditionID] Windows 8 Pro [Channel] Retail [VL] 0 Thank you!