This is the heart of the matter. Due to the proprietary nature, you cannot simply Google and download with confidence. Here are the only reliable sources for an update:
If the system does not boot after the flash (Black Screen):
Restart your computer. During POST, pause the screen (usually by pressing the Pause/Break key). Look for a string similar to:
Users of the 600 PG reported random 2-3 second stutters in Windows 11 (WDF violations). Phoenix engineers identified a latency handshake error between the TPM 2.0 module and the PCIe root complex.