Mohamed if the hard drive has bad sectors on it is best to replace the hard drive itself. But you need to save the files first by doing so, you have to do a parallel re install. Parallel re install is like booting your hard drive with 2 operating systems for details on how to do that click on this link.
Once you are finished try downloading and saving it on a external hard drive all the files that you saved. Purchase another hard drive and upload the files that you have saved
First disconnect any external devices connected to the computer except the mouse and keyboard.
This error usually happens if the hard drive is not getting detected by the operating system or due to bad hard drive.
First check if all the physical connections to the computer are set correctly.
If it is a laptop remove the laptop battery, wait for 5 minutes and then connect back the battery, check if it works.
If the above step does not work then you will need to run CHKDSK tool to check if there are any bad sectors on the hard drive would suggest running chkdsk which would scan for any bad sectors on the hard drive and if those errors are repairable if would repair and if it cannot at the end of the chkdsk scan you would see a message "found one or more unrecoverable error on the hard drive" which means the hard drive is damaged.
If you have a Windows Vista installation disc, you need to restart (boot) your computer using the installation disc. If you do not restart your computer from the disc, the option to repair your computer will not appear.
1. Insert the installation disc.
2. Restart your computer.
Click the Start button, click the arrow next to the Lock button , and then click Restart.
3. If prompted, press any key to start Windows from the installation disc.
Note: If your computer is not configured to start from a CD or DVD, check the information that came with your computer. You may need to change your computer's BIOS settings. For more information, see BIOS: frequently asked questions.
4. Choose your language settings, and then click Next.
5. Click Repair your computer.
6. Select the operating system you want to repair, and then click Next.
7. On the System Recovery Options menu, click command prompt and in the command prompt typechkdsk /f and wait till the scan is completed and later restart the computer and check what happens.
http://windows.microsoft.com/en-US/windows-vista/Make-system-repairs-from-the-Windows-Recovery-Environment-from-Windows-Vista-Inside-Out
Important: While performing chkdsk on the hard drive if any bad sectors are found on the hard drive when chkdsk tries to repair that sector if any data available on that might be lost.
Hope this helps!
If you need further help, reach me via phone at https://www.6ya.com/expert/joel_63c670a84e9f6a97
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