I have a notebook computer w/ Windows Vista. I cannot get to my desktop, reinstall anything!!!-I keep getting the error;
Operating system not found.............
0XA0000000
I am ready to pull my hair out...I would appreciate any help offered....

I have all the restore disks. I have the Windows Vista software. However, none of them get passed the error message;
Operating system not found
Media check failure, check cable
Does anybody have any ideas? I unfortunatly am not very computer literate
Could it be my hard drive? To my untrained eye, this is what all the info I have collected via the Internet seems to point at. HELP !!!!!!!!!!

What does this error code mean?

0XA0000000