I had a new hard drive put into my son's Toshiba Satellite laptop and added more memory. I bought Windows 7 and installed it onto the laptop for him. In the device manager it has a question mark under Mass Storage Controller and I have tried unsuccessfully to find a driver that will load onto his machine. I can find lots of sites that want you to pay to fix the problem, but none that are free. Can anyone help. He says his computer keeps freezing and I have reloaded Windows 7 and it has not frozen since. I really need to sort the problem of the Mass Storage Controller though. Any help would be appreciated.