windows failed to start

I recently restarted my computer and the following error message appeared.

Windows failed to start. A recent hardware or software change might be the cause. To fix the problem:

1. Instert your windows installation disk and resart your computer.
2. Choose your language settings and then click "Next."
3. Click "Repair your computer."

If you don not have this disk, contact your system administrator or computer manufacturer for assistance.

File: \Boot\Bcd

Status: 0xc000000f

Info: An error occurred while attempting to read the boot configuration data.


I have followed all the instructions to no avail. I also entered the command feature and attempted to rebulid the bcd but it gives the error message "the requested system device cannot be found." I have a lot information on the hard drive so i would really like to be able to fix it without loosing any of the information. Any help would be much appreciated.

I have resolved this problem.

I downloaded windows 7 RC from the link below and put in on a disk. I booted it and used the repair my computer option and it worked.

http://www.microsoft.com/windows/win.....;/download.aspx

I hope this helps.