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• The hard drive has been formatted or fdisked;
• Accidental file deletion
• The hard drive makes clicking noises;
• The hard drive is inaccessible;
• Damage due to a power failure or power surge
• Corrupt or missing critical file system structures
• Partition damage by computer viruses
• Drives that have been fdisked or formatted
• The primary or secondary hard disk has failed and the system BIOS displays the message "Primary hard disk failure" or "Secondary hard disk failure";
• The system displays the error message "boot disk error, insert boot disk press any key to continue";
• Data loss as a result of bad sectors on the hard drive or software program failures
• System displays the message "NTLDR is missing, Press any key to restart"
  The hard drive has a corrupt or damaged partition table;
• The hard drive has become inaccessible due to virus attack or virus infection;
  The hard drive is no longer recognized by the BIOS after rebooting, despite the platters spinning;
• The system displays the message "Operating system not found" or "missing operating system";
• The BIOS recognizes the hard drive but with garbage parameters;
• The BIOS recognises the hard drive but the data is inaccessible;
• Hard drive makes grinding or clicking noises, normally associated with electro-mechanical failure;
• The hard drive reports bad sectors or bad blocks
• Hard drive failure as result of electronic or mechanical malfunction;
• Blue screens or extremely slow computer performance while opening application