When I boot up, my computer starts but nothing happens, just a blank screen so I have to re-boot then after the countdown in normal mode all's well again, any ideas?

Perhaps a stuck/corrupt device driver and/or system file ?!?

Have you tried last known good from the Boot Menu Options by pressing the F8 key while the OS boots ?!?

If you can get back into Normal mode after the initial hanging and then a reset, you may want to look at Device Manager and see if any Yellow exclamations or Red X's show up, this could be the culprit.

What was the last app and/or driver updates you did to the machine ?!?

I bought and downloaded Peretologic to erase my HD. Before I used it I had 13Gbs after using it I now have 30Gbs. The booting problem seems to have righted itself, well it's ok today but who knows what tommorow brings,computers as you know are very temperamental. Thank you, Happy New Year.

You're welcome and you too have a great new year