A few months ago I replaced my Toshiba Satellite A665 hard drive. A couple of weeks ago I upped my RAM from 4 to 8Gb. Is it a coincidence that shortly thereafter it started not to boot properly? When I wake it up from sleep the hard drive starts to spin, then it suddenly goes black, and then the (safe mode) window with the "start windows normally" highlighted appears. I click and it starts up again but anything I was working on is now gone.