For most PC's with BIOS, the hard-drive disk should correctly recognize startup. To do this, reset the BIOS default settings. On the BIOS screen, look out for indications on the top or bottom which are pre-assigned by function keys. (F10 is the default restore key). Then save and exit. As no error is encountered constantly, monitor the progress on the screen to ensure that no error returns. Do a thorough check up of the IDE cable
If your computer has just been formatted, your computer might require you to insert the boot CD to be able to run it. You might get the error message Disk Boot Failure- Insert disk and press enter displayed on the screen every time you will try to run it. This might be linked to:
1. The boot options not correctly set in BIOS
2. A non bootable CD is found in your CD drive
3. You do not possess any bootable device
4. You have installed a new hard disk
5. The hard disk is not properly plugged in
6. Your system files have been infected
Solution 1: Ensure that your drives are empty
If there is a non-bootable CD or disk in the drives, your computer might be attempting to boot the program with this disk. Hence, ensure that the floppy disk drive, the CD/R and DVD drives are all empty before restarting your computer and trying to run it again.
Solution 2: BIOS set up
If this has not solved the problem, it might be linked to an incorrectly set up BIOS.
1. To enter BIOS, press the F8 key when the Windows screen shows up upon starting the computer
2. Then all you have top do is to prioritize the boot sequence to Disk C:
Solution 3: New hard drive configuration
If you have just installed a new hard drive, you should insert the system installation CD and restart your computer again so that it reboots with the CD.
Solution 4: Hard drive not properly plugged in
If your hard drive is not properly plugged in, this can also lead to a rebooting error message. Switch off your computer and remove it from the power supply before checking the cables attached to it. Ensure that the motherboard is correctly installed. Once you have done this, try running your system again.
Solution 5: Restore the corrupted system files
If neither solution has solved your issue, then it might be due to a corruption of your system files.
1. Start your computer with a system boot CD and once it is running, enter the command "Dir C:" to ensure that you can access the C: drive's contents.
2. If the computer enables you to access the contents, then you can enter the command:
fdisk /mbr sys c:
Before restoring the boot sector with this command, if there is any risk of a virus, it's recommended that you use antivirus software such as DOS F-prot.