If you recently reinstalled Windows or checked your Device Manager, you might have noticed a yellow exclamation mark next to an . When you check its properties, the Hardware ID reads ACPI\VEN_MSFT&DEV_0101 (or a variation like ACPI\MSFT0101 ).
: Dictates the device model identifier, mapped globally under the Microsoft hardware ecosystem to TPM 2.0 . Common Symptoms and Error Messages
Finding the ACPI\VEN_MSFT&DEV_0101 as an unknown device in your Device Manager is a widespread and well-understood issue, not a sign of a failing PC. In almost every case, it is your system's Trusted Platform Module (TPM). While seeing a yellow exclamation mark can be alarming, it is usually a minor driver installation problem, not a hardware fault. acpi ven-msft amp-dev-0101
: Advanced Configuration and Power Interface (how OS talks to hardware). VEN_MSFT : Vendor is Microsoft. DEV_0101 : Device ID referring to a TPM 2.0 interface.
: The Device ID "AMP-DEV-0101" provides further details about the device. The prefix "AMP" could imply "Advanced Management Platform" or relate to another specific technology area. The numeric suffix "-0101" usually indicates a specific model or revision of the device. If you recently reinstalled Windows or checked your
The payload's first instruction: JMP 0xFFFF0 — the reset vector.
Understanding the ACPI\VEN_MSFT&DEV_0101 Driver Error The hardware ID represents a virtualized system device specifically linked to Microsoft Hyper-V environments. When you see this identifier in Windows Device Manager with a yellow exclamation mark, it indicates that the guest operating system cannot properly communicate with the host virtualization infrastructure. This identifier breaks down as follows: ACPI : Advanced Configuration and Power Interface. VEN_MSFT : Vendor ID assigned to Microsoft Corporation. : Advanced Configuration and Power Interface (how OS
: The operating system registers that the physical layer failed to link up during a kernel transition.
The device is often managed in the BIOS under names like "Intel PTT," "Security Chip," or "TPM Support." If you don't use BitLocker, you can often disable it here to remove the error.