1. Hresult 0x80070005

Dear All, I tested Windows 10 in place upgrade on test machines and it worked fine. Now on some machines task sequence fails for windows 10 with below.

Hresult 0x80070005

I have a task sequence in SCCM 2012 SP1 that is supposed to install Windows 7 on Disk 0 and Windows 8 on Disk 1:
Attachment 17063
It installs the first OS (Windows 7) absolutely perfectly, then reboots and starts the Windows 8 installation,
However, when it start to try and install the SCCM Client it fails with an error code of '800700B7' and reboots - into Windows 8 (since its now the default OS) but without any CCM Client or software installed.
On a different note, I need to get a Variable added to give the 2nd OS a different name - otherwise the Win7 OS is knocked off the domain