Many thanks Si.
Just did a prompted system restore - several minutes.
Will be interesting to look at the events log....many thanks.
I thought it may be over-heating but the fan kicks in, and the timing for it dumping on me is very random?
When re-booting it just asks for a restore, other times its asked if to start in safe mode or normally.....Ive tried them all.
Thing is, it could be fine later if I get the chance to try it.
Many thanks for all the info fella.