How do I fix error Operating System Not Found in Windows?

The error of Operating System not Found can be resolved by following the following steps:

  1. BIOS/UEFI Check boot order to ensure that your hard disk is first.
  2. You need to reconnect your hard drive to make sure that it is connected.
  3. Reboot into windows using a USB windows installation: Reboot into windows with a USB windows installation:
  4. Booting using USB Drive - Select Repair your computer -Troubleshoot- Command Prompt- bootrec /fixmbr and bootrec /fixboot.
  5. Diagnose Hard disk problems by running chkdsk in Command Prompt.
  6. Windows may be installed again as a final resort.
 
This error often occurs due to boot order issues or a damaged boot sector. Check BIOS boot settings, reconnect the hard drive, or use Windows recovery tools to repair startup files.
 
To fix the "Operating System Not Found" error in Windows, check BIOS boot order, ensure the hard drive is detected, repair the Master Boot Record using Windows Recovery, or reinstall Windows if necessary to restore the OS properly.
 
Fix Operating System Not Found by confirming the BIOS boot order, re-connecting the drive, using Startup Repair, repairing boot records with bootrec commands, scanning disk errors or reinstalling windows where necessary.
 
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