The SSD is partitioned, has a drive letter and is switched to GPT as Windows told me to switch to GPT. Now I'm getting to a certain point where I'm told 'Couldn't create new partition or locate existing one'. Or in drivers: 'No signed device drivers were found. Make sure installation media contains correct drivers.' Any browsed drivers listed are not accepted. The Win10 ISO file was downloaded onto a DVD in one piece from Microsoft. Any help would be appreciated. HP