For the 3rd time I run into a problem AFTER I make a back-up. To be sure that I will not run in problems I make a back up during the night. Next morning I find my screen stating that back was ok. Than I want to continue to work on my computer and the disk does not start up anymore. Read disk error; press control alt delete ..... Finito. I a more safe withoput back-up than with .... Tried MBR recovery tool ... no results ... What to do?