Get into BIOS on boot up and try and find a setting to fix it.

Switch on and press the correct key again and again - it could be Del or F11 -
you may have to search on the internet to find the correct key
to get you into the BIOS on your motherboard.

Sophia wrote on Jul 16^th, 2025 at 9:53pm:



It needs patience and a cool head -
there will be an answer somewhere on the internet.
On your second attempt you might find it.

AI Overview

A "Secure Boot Violation: Invalid Signature Detected" error indicates a problem with the secure boot process, where the system's attempt to verify the authenticity of bootloaders and operating system files has failed. This typically means that the digital signature of a component attempting to load during startup is invalid, preventing the system from booting securely.
Troubleshooting Steps:
1. Access BIOS/UEFI Settings:
Enter the BIOS/UEFI setup utility by pressing a specific key (like F2, Delete, or Esc, depending on your computer's manufacturer) while the system is booting.
2. Locate Secure Boot Options:
Find the Secure Boot settings, usually within the Boot or Security section of the BIOS.
3. Disable Secure Boot (Temporarily):
If you are unable to boot using Secure Boot, temporarily disable it. This allows you to access the system and potentially resolve the underlying issue.
4. Check Secure Boot Policy:
If Secure Boot is enabled, review the secure boot policy settings. You may need to clear existing keys and re-register them, or update your BIOS/UEFI firmware.
5. Update BIOS/UEFI Firmware:
Check your computer manufacturer's website for BIOS/UEFI updates. Updating can resolve compatibility issues or corrupted keys.
6. Reset BIOS/UEFI to Defaults:
If you are still having trouble, try resetting the BIOS/UEFI to default settings. Ensure you back up any important data before making these changes as it can affect your system's boot process.
7. Consider Driver Signature Enforcement:
In some cases, unsigned device drivers can cause Secure Boot violations. You can try disabling driver signature enforcement, but this should be done with caution.
8. Seek Further Assistance:
If the issue persists, contact your computer manufacturer's support or a computer repair professional for more in-depth troubleshooting.

Dear ohh dear.

Was your hard drive an SSD or an old fashioned hard disk?

Do you have a USB drive that has all your old hard disk backed up?

Does your existing Motherboard have TPM - Trusted Platform Module -
which is required for Win11  ?

I keep getting a misdirection message when trying to post in here 

Sophia wrote on Jul 18^th, 2025 at 3:04pm:



At least its working for you now on Win11. 

You must have TPM - Trusted Platform Module - on your Motherboard -
unless it's been bypassed?



1. Using the TPM Management Console:

Press the Windows key + R, type tpm.msc, and press Enter.
If a TPM is present and enabled, the TPM Management console will open, displaying information about it.
If the console doesn't open or displays a message about the TPM not being found, it might be disabled in the BIOS or not present.