HP Compaq CQ45-m02tx's Legacy Mode Disabled And Enabled Again After Reboot

Hello, thank you for choosing HP products.

Please note that after saving and exiting, you will be prompted to enter a random four-digit number when you turn on the computer, so please follow the prompts to enter the number and click Enter;

Because the settings will only be saved after you enter them;

The following chart is for reference only, please refer to your actual display:

Or

I hope the above reply will be of help to you! helpful.