Hi Mohan,
· Did you make any changes to the computer prior to the issue?
These errors often occur if there are incorrect BIOS (Basic Input\Output System) settings.
**Method 1:**Check if the computer`s boot options are changed in the BIOS. You may set the hard drive as the first boot device. Also, check to make sure that 'Wake on LAN' option or the one similar to this is turned off.
**Method 2:**Load default BIOS (Basic Input\Output System) settings and then restart the computer.
Important **:**Updating/Modifying BIOS can be a complicated process, and if an error occurs, your computer could be rendered inoperable. Be sure to follow the manufacturer's instructions exactly.