Awhile ago I had a booting issue. Finally got to a point where my PC would boot, but noticed I totally 'lost' 1 of 3 1TB SATA drives I have installed PLUS a partition on my C drive is gone. About 1 week or two ago there were several updates to install. After rebooting my drive and partition where visible. After the next boot they disappeared again. I am stumped! All 3 drives show up in 'setup'. Any insight? Suggestions?