I have a Toshiba Satellite laptop that will not boot into Windows 7, keeps recycling. It hangs up trying to do a Windows Repair. I've run the PC-Doctor diagnostics and the HDD is failing on the Linear test, SMART short test, SMART long test, and forget the name but the read test or something like that. Wondering if these indicators with diagnostic failures on the HDD could be the reason Windows will not boot into Safe Mode nor successfully run a Windows Repair without hanging up. Any thoughts?