I have a Toshiba Satellite L655-S5157. Recently a new hard drive was installed and for awhile ) about one month) it seemed everything was alright. But now when I go to start up the lap top this is what happens. Start up then it goes to the splash screen then to a black screen telling me that "Windows Has Failed to Launch Startup". Recent hardware or software changes may be the problem. Then it gives me an option to Launch Startup Repair. When I click that option the screen goes black then the computer shuts off. Would someone please advise?