Lock-up again,, and again,

A number of things will do some or all :d But I would say 1st its a hard drive issue, as in it on the way out, back up NOW! and it could be the power supply on the last legs. Dodgy power will cause all sorts of behaviors, a symptom that points is your CD drive errors. At least this is what I have found
Cheers Scott

Thanks Scott, during this fault I have run a couple of different HDD systems, 2 x 500 cav blk with a 1tb green as backup, a 1tb blk cav with a green as backup and a 120ssd with just windows, all my other stuff on the 1tb blk with the green as backup, and the fault has happened whichever I've used,,