Thanks for the welcome, YoKenny, and for your suggestions.
I have tried the first link you suggested and discovered that, in fact, on the last 3 of 4 occasions I turned on laptop I was informed that one of my disks was corrupt; chkdsk run and errors corrected or recovered...... not exactly sure as it goes too fast for me and last time I tried screen snatch it did not work - my lack in IT eduction I presume!!!
I'll try second link and get back to you later - will also check what version CC I am using - I think its version 9, but reading through these threads am afraid to update in case I have more problems.
Regards,
Special Lady