I was suggesting, if the PC isn't connected to the Internet in this hypothetical case, why does the Intel backdoor matter? It wasn't clear to me the OP was trying to actually use the Intel Management Engine for legitimate purposes. I apologize.
How old?
To be clear, this is not a technical side-effect of some incidental reliance of the boot process on the management engine (ME). Instead, Intel has deliberately made it impossible for consumers to disable the ME, has obfuscated how the ME works, and offered ME-disabled computers only to "military, government and intelligence agencies".
All under the guise that "Intel considers disabling ME to be a security vulnerability, as a malware could abuse it to make the computer lose some of the functionality that the typical user expects, such as the ability to play media with DRM" - which is beyond laughable.
In short, it could not be more obvious that the ME is malicious.
Source: https://en.wikipedia.org/wiki/Intel_Management_Engine
fixed it
(Edit: I didn't make the relationship between these clear. All modern Intel laptops have ME. AMT is a software component that runs on top of the ME, but is only provisioned for systems that have VPro badging)