[michaelt]

Well, it's sorta possible. Just not with the TPM, and not in general purpose computing applications.

Games consoles are super locked down, to prevent piracy, and some modern consoles have gone years without a successful hack, despite being in the physical possession of the attacker. The iphone's activation lock is extremely hard to bypass, and even cops and border guards struggle to extract users' data.

Simply buy your PC from your operating system vendor directly, and forego options like being able to replace components and being able to install your own software, allowing the memory and PCI bus to be encrypted. Add some cloud backup features so the device can wipe itself at the drop of a hat without losing your data. After that, just have your OS vendor produce perfect code with no exploits, and you're secure!

Simple! /s