[sccm 2012] OSD problem on an old laptop

[mrbios]

I've got a fairly old laptop here (The latest drivers on the manufactuerers site are vista) and it has a horrible SiS based network controller. I'm using SCCM2012R2, i can PXE boot the laptop and start the image going, it'll install windows perfectly fine and all the drivers will apply and it'll add to the domain, but as soon as it restarts after adding itself to the domain at the point where it should then reload the boot image and continue you the process of installing software, it then loads to the windows login screen.....

 

I can use this same task sequence on other laptops and they'll image perfectly fine, and the logs appear to be of no help on this one whatsoever, is it likely that the laptop just isn't fully compatible with the boot image/windows 7 or can anyone recommend something to try? I'm out of ideas