Startup Error Please Help Immediately :(

Yesterday, my win7 has suddenly crushed after a restart. I didn't understand what happened. I haven't installed or uninstalled a program or plugged a device. The black screen about recovery comes. http://www.withinwindows.com/wp-cont...8/12/menu3.png. When I tried to restore windows it shows 0 mb partition and the C: drive is missing. It show 0 mb partition and the drive is "C:". I've tried bootrec and bootsect commands but the situation didn't change. Also I tried with a Vista dvd but it doesn't help. I've many important files in the pc, I don't have a chance to format my pc. Please somebody help..

Btw, I'm using Sony Vaio notebook.

Hi,
If safemode doesn't give you a solution, maybe a "startup repair" can help you? See tutorials here: Startup Repair
Kind reg,

When I run the windows in safe mode the installation window comes. 2 options installing or repairing but I can't repair because of partition problem. It's just like missing operating system but something different. Btw, there is no repair option for me in the advanced boot options. http://cranialtrauma.co.uk/wordpress...artup-menu.png (at the top)

Yes I've seven install dvd. It came as preinstalled but I've formatted it and installed by myself.

I have important docs on the C: drive. The notebook is my father's I don't know what to do

Btw, when startup repair is done. It helps nothing but it says:

Root cause found:
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No OS Files found on disk.

Repair action:Partition table repair
Result:Failed. Error code = 0x490
Time taken = 672723 ms

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I'm planning to unplug and plug the hdd.. Does it help ?