Hi Alain,

Disk boot failure Insert system disk error can occur for several reasons, including either hardware or software changes.
It may also occur if there is a CD or a diskette in the drive while starting the computer. An incorrect boot sequence, a newly installed hard drive, an unplugged hard drive or a damaged disk may also result in the same error being shown.

Below are some possible solutions to fix this issue:

1. Check to see if there is a disc stuck in the drive- if so, remove the disc(s) and try again.

2. Enter the BIOS setup of your computer and edit the boot sequence so that the computer starts primarily on drive C.

3. If a new hard drive has been installed, this message is quite normal. Insert the installation CD for the operating system you wish to use and then restart the machine, having made sure the CD-ROM is defined in the BIOS setup as first in the boot sequence.

4. Open the system unit and check the power cable of the hard drive is properly connected.

5. It may be that some system files needed to boot the computer have been deleted or damaged or that the boot sector of the disc is damaged.

To find out if this is the case, start the computer with a system disk or CD-ROM installation of your operating system (via the Recovery Console), and type "Dir C:" to check if the contents of the C drive are accessible. If they are accessible, the problem comes from missing or damaged files and you need to run the command:
fdisk /mbr
sys c:

6. If the hard disk or a partition is damaged:

• If it is detected in the BIOS setup, there is a chance that it can be recovered.
• If so, try reinstalling the system through the installation CD, in order to reformat or recover the partition using a utility.

I hope this helps.

Regards,
Lokesh