when i started it first time it started giving me some kind of error and restarted, then again it happen so i recovered it, this notebook has 750GB+750GB HDD and in explorer it was showing 4 drives of 350GB each, after recovery when it started the 2 drives dissappear and only C and F was showing, i contacted customer care they told me to recover it again (RESET PC FULLY), i did that many times, but no success, i dont know how to use disk management, pls help