Error 0x0000007B, translates to a decimal value of 123. However, in the context of computers, it’s more commonly recognized as a hexadecimal code representing a specific error message: INACCESSIBLE_BOOT_DEVICE.

This error indicates that your computer is unable to access the hard drive that contains the Windows startup files. There are several reasons why this might happen:

• Missing or Corrupted Bootloader Files: The files responsible for booting your computer (like the Master Boot Record or BCD) might be missing or corrupted.
• Incorrect BIOS Configuration: The settings in your computer’s BIOS (Basic Input/Output System) might be incorrect for your hard drive controller.
• Hard Drive Issues: The hard drive itself could be faulty, have loose cables, or contain corrupted data.
• Boot Sector Virus: A virus infecting the boot sector of your hard drive can prevent it from booting properly.

Here are some steps you can try to fix the 0x0000007B error:

1. Restart Your Computer:

Sometimes, a simple restart can resolve temporary glitches that might be causing the error.

2. Boot into Safe Mode:

Safe Mode loads Windows with a minimal set of drivers and programs. Try booting into Safe Mode and see if the error persists. This can help identify if a recently installed program or driver is causing the issue.

• For Windows 10/11: Hold down the Shift key while clicking on “Restart” from the login screen. This will take you to the Advanced Startup options menu. Navigate to Troubleshoot > Advanced options > Startup Settings > Restart now. Once your computer restarts, you’ll see a list of boot options. Choose “Safe Mode” to boot in Safe Mode.

3. Repair Startup (for Windows 7, 8, & 10):

Windows has a built-in Startup Repair tool that can attempt to fix boot problems. You might need a Windows installation disc or recovery drive to access this option.

4. Check for Hardware Issues:

• Hard Drive Cables: Ensure the data and power cables connecting your hard drive to the motherboard are securely plugged in.
• BIOS Settings: Verify that your BIOS settings are correct for your hard drive controller. The specific setting names and locations might vary depending on your BIOS version. Consult your motherboard manual for guidance.

5. Run a Virus Scan:

Perform a scan using your antivirus software to detect and remove any potential boot sector viruses.

6. Advanced Troubleshooting (if comfortable):

• Rebuild Bootloader Files: This process can be complex and requires technical knowledge. It involves using tools like Bootrec.exe to rebuild the boot configuration data.
• Reinstall Windows: If all else fails, a clean install of Windows might be necessary. This will erase all data on your system drive, so be sure to back up important files beforehand.

It’s important to note: These are general troubleshooting steps. The most effective solution will depend on the specific cause of the error. If you’re not comfortable troubleshooting hardware or advanced software repairs, consider seeking help from a computer technician.