ok, I'm not experienced with problems like this so... I have a toshiba laptop which came preinstalled with windows 7 home so I have no disc(before you say that)and I got the computer december 2010 so roughly 2.5 months ago. When I try to boot it comes up with an error in a popup box which says disk boot failure and gives me 2 options: scan the hard disk for problems or ignore. If I press ignore it scans, if I press scan it scans as well.. after the scan it gives me one option: install 'Hard Disk' software to solve it. you click that it closes and does nothing.. this entire thing happens in safe mode which turns on automatically.