I minor fail, HDD. Last nite the machine froze many times and had to reboot after each freeze. So I fitted an SSD and it fired up fine ok. So booted from a USB 10.7 and tried to put my time machine backup back. I get error every time I try and it requests I restart and try again. I do not have a caddy for a 3.5" drive at moment to test it further. I'm gonna try a fresh install on 10.7 then upgrade to El capitan. This is first time I seen A TM not work. OK I know it's not best system but to recover the same machine I should work.