Invalid signature detected ?

[CottonTail57]

HP all in one desktop pc 

windows 10 

[Deep_World]

Hi @CottonTail57,
 
Welcome to the HP Support Community!

Thanks for reaching out!

I understand how concerning it can be to see an “Invalid Signature Detected” message on your HP All-in-One PC. 

Could you please share the exact model number of your HP desktop? 

In the meantime, here are few steps you can try on your Windows 10 system:

01.Power Cycle the PC

Shut down your PC completely

Disconnect the power cable

Hold the power button for 15 seconds

Reconnect and power on

02.Access BIOS Settings

The error often relates to Secure Boot or BIOS signature verification.

Turn on PC → Immediately press Esc repeatedly → Select F10 BIOS Setup- Navigate to Security → Secure Boot Configuration

Ensure Secure Boot is enabled

If already enabled, try disabling temporarily to test

03.Check Boot Order

Incorrect boot device priority can trigger signature errors.

In BIOS → System Configuration → Boot Options- Confirm your primary hard drive is listed first

Save changes and exit

04.Run HP Diagnostics

HP PCs include built-in hardware diagnostics to detect issues.

Restart PC → Press Esc → Select F2 System Diagnostics- Run Startup Test

Run Boot Test

Kindly Note if there are any error codes. 

I hope this helps.