Boot MGR not found. Press Ctrl+Alt+Del to restart (Windows 7)

One day morning, when i on the computer.
It said,
Boot MGR not found.
Press Ctrl+Alt+Del to restart.
First i thought of re-installing fresh OS.
But,

I booted through my OS CD and press REPAIR.
It automatically said that StartUp repairs are found.
Press Repair & Finish to repair.
I felt very happy & Press to repair.
But, still the problem exist.
I want to try one more time and booted again with OS CD.
Then i choose REPAIR.
It doesnt showed me any Automatic suggestion as before.
Then I selected "StartUpRepair" and press Next.
Thats it it restarted the PC and it worked fine.
After restarting i opened blogger and posted this..



Hope this helps...