Boot Error

Your hard drive has failed.

While you can try:  Unplugging the system, disconnecting the battery from the system board, and then removing and reinstalling the drive to see if it's then seen by the system,

More likely:  the drive is toast and will need to be replaced, and the OS and applications reloaded, followed by restoring whatever data you have backed up elsewhere.

Welcome to the Dell Community @Trayaksh 

Looks like it is time to replace the hard drive.

To better assist you, the members and I would need the exact model number of your laptop/desktop???

1. Identify your Dell:

https://www.dell.com/support/contents/us/en/04/category/product-support/self-support-knowledgebase/l...

1. Go into your BIOS.

Power-on the system and start tapping the F2 key to enter System Setup.

1. In Windows:

Hold down the” Windows “key and tap the “R “key.

Then type msinfo32 and hit enter.

Best regards,

U2

Perform a hard reset.

1. Turn off the computer.
2. Disconnect the AC adapter or power cable from the computer, and remove the battery (for Dell laptops with removable battery).
   NOTE: For Dell laptops that have a nonremovable battery, see the Dell knowledge base article  How to reset Real Time Clock (RTC).
   For Dell laptops with removable batteries, see the  User Guide for your Dell laptop for step-by-step instructions to safely remove the battery.
   NOTE: On select Dell Latitude laptops, try to recover the laptop using the forced ePSA method from a POST or boot failure. To learn more, see the Dell knowledge base article  How to Use Forced ePSA to Recover from POST or Boot Failure.
3. Disconnect all devices such as USB drives, printers, webcams, and media cards (SD/xD).
4. Press and hold the power button for 15 to 20 seconds to drain residual power.
5. Connect the AC adapter or power cable and the battery (for Dell laptops).
6. If your Dell computer can turn on but is unable to boot into Windows, identify the symptoms and follow the appropriate troubleshooting guide.
7. If your Dell computer is not able to turn on, follow the troubleshooting guide for no power symptom in the table below.