hard drive problem in windows 7

[Nadiaa]

Hello to all,
I recently buy new Compaq computer which has windows 7 installed in it.It works fine until last night .Last night I watch some movie and after that log off properly.Today when I tried to switch on it windows 7 will not boot and the hard drive is not showing up in the BIOS Sata 2 device listing.I don't know why this happened.Please help me.
Thank you.
For you information I listed my computer configuration.
500 Gb SATA II HD
DVD Burners
ASUS Rampage II Extreme
Intel Core i7 920 @3.8 GHz

[deoWo]

It may happened that your hard drive is not connected properly or your hard disk doesn't get enough power supply .I suggest you that first disconnect your power supply from computer.Open your computer case with proper screwdriver and see how your hard disk is connected.Then disconnect it and again connect it properly.Then connect it with power supply and switch on.Now I think your problem is solved.

[RoninBlade]

Before doing any thing try to see hard disk in Safe Mode.Is your windows 7 crash when trying to boot normally? If so, boot back into Safe Mode, and type "msconfig" at the Start Menu search dialog box. Click on Diagnostic startup to see if it boots normally.If it boot normally,then you have a driver or application issue that you will need to troubleshoot by doing selective startup and using trial and error.
I think this will help you.

[Fabian]

It may seem that you are dealing with a completely different problem.I suggest you try to install new windows 7 if you have CD .If you have windows 7 CD and you get same problem installing it then it may be problem in your hard-disk .Then get advantage of your warranty.Replace hard-disk with new one.