windows will not start up

Wan i het the power butin the furst screen cumes up with the bar that show windows
Is doing sumthing and it stops 3/4 of the way throw and dus nuthing there is f2 and f12 opchins to the right and if i het f12 boot options itgos to a punt that it wunts me to start windows and i cant i
Have a good windows7 cd in it if i late it set a screen come up and ( operating system not found) iwus doing a hard drive chake wan all want to hell if any one can help plz

You should read through Troubleshooting Windows 7 Failure to Boot and do the steps there. Post back if you need help as you proceed through that tutorial.

Prior to doing the above, read carefully through System Repair Disc - Create.