I have a Toshiba A135-S4467 laptop that would freeze on the windows load screen so I replaced the hard drive after several attempts at formatting and reloading that were unsuccessful. I put in the new hard drive and completely installed windows but it still freezes at load up, I did get it to start a couple times but the CPU would peg at 100% and would freeze up after about 20 seconds. It will however start and run in safe mode.