How to Fix: Ubuntu Efi disk read & boot error

The error 'EFI disk read error' occurs when attempting to boot from a CD or USB installation media on a Fujitsu LifeBook laptop, specifically with Ubuntu 12.04 LTS installed. This issue affects users who have installed Ubuntu via USB and are now unable to boot from other installation media due to Secure Boot not being enabled.

This problem is frustrating because it prevents the user from installing alternative operating systems like Windows. Moreover, the inability to access the BIOS settings makes it difficult to diagnose and fix the issue.

💡 Why You Are Getting This Error

• The primary reason for this error is that the Secure Boot feature is not enabled on the Fujitsu LifeBook laptop. When Secure Boot is enabled, the UEFI firmware enforces a boot mode where only authorized operating systems can be booted. If Secure Boot is disabled, the UEFI firmware defaults to Legacy BIOS mode, allowing other operating systems to be booted from CDs or USBs.
• Another possible reason for this error is that the UEFI firmware on the laptop's EFI disk is damaged or corrupted, preventing it from being read correctly.

🚀 How to Resolve This Issue

💡 Conclusion