Laptop starting up but then not responding? Windows 7 common problem!

Be aware, you might lose all your data!

What are the system recovery options in Windows? Windows 7 Windows Vista Windows 7  Windows 7 Windows Vista
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  Windows 7
The System Recovery Options menu contains several tools, such as Startup Repair, that can help you recover Windows from a serious error. This set of tools is on your computer's hard disk and on the Windows installation disc.

Notes
•You can also create a system repair disc that contains the System Recovery Options menu. For more information, see Create a system repair disc!
•If you use a Tablet PC or other computer with a touchscreen, you might need to connect a keyboard and mouse in order to use Startup Repair and the other tools in the System Recovery Options menu.