[aimeeg]

Ok, so my brother's computer stopped working...when you turn it on the startup loops. First it goes to a black screen with options to start in safe mode/ last known good configuration/normally, then when one of these are selected it takes you to a blue screen with 'unmountable_boot_error' (what does this mean?!) and then turns itself off to repeat the whole process again.....
I know that by pressing F8 you get to another screen where you can disable the looping and have other start options, but no matter which of these is selected we are taken back to the blue screen and the computer freezes there on us.
we are really puzzled as to what to do and any help would be much appricated and is greatly needed!!! Thank you.....

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Hi There,

It means that the OS or bios are not detecting your hard drive. I recently had this problem at a friends house and easily fixed it. If you have your windows CD, what I did was had it boot to CD at startup, then ran "To repair a Windows XP installation using Recovery Console, press R" logged in as the administrator and typed in chkdsk/f and it checked the hard drive and fixed the error. The computer was then able to boot back into windows again.

[totallyspecced]

Hi There,

It means that the OS or bios are not detecting your hard drive. I recently had this problem at a friends house and easily fixed it. If you have your windows CD, what I did was had it boot to CD at startup, then ran "To repair a Windows XP installation using Recovery Console, press R" logged in as the administrator and typed in chkdsk/f and it checked the hard drive and fixed the error. The computer was then able to boot back into windows again.

[aimeeg]

thank you!! Does this mean that I will lose everything on the computer?

[totallyspecced]

NO way. Your data should be safe and should be there once you boot up again.

[anzenketh]

Go ahead and rebuild the boot sector.

You can follow these instructions.

HERE