After successfully installing W7 Ultimate, like I have done in the past on my 2 other PC/laptops, it was running fine. I Used Daz loader to activate it, it restarted and was running as genuine and fine. When I restarted it, I logged into the bios menu to change the boot priority back to default (I booted from a USB as I always have done in the past) and Windows failed to load. The startup repair diagnosis returned the root cause as above in the title. It is a Lenovo T61 and had Ubuntu previously installed, I did a clean install and deleted all partitions, and used all the unallocated space to install Windows (meaning I created no partitions and clicked next). It's gone to startup repair twice with the same results. I'm not sure what has gone wrong, Could it be the hard drive (It is making loud noises but the person I got it from said it has been doing that for a while). Help!!