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If you are running a virtual machine (VMware, VirtualBox, or Microsoft Hyper-V), you will almost certainly see this device. In a virtualized environment, the host hypervisor does not expose real physical hardware to the guest OS. Instead, it exposes synthetic devices.
: If this appears as an "Unknown Device" in Device Manager, it usually means TPM is disabled in your BIOS/UEFI settings under the "Security" or "Advanced" tab. Automatic Installation
User reported: Error appears on a Windows 11 VM running on Proxmox (KVM). Solution: Proxmox (KVM) does not emulate the exact Microsoft synthetic ACPI interface for power management. The user disabled the device. No performance or power impact inside the VM. acpi ven-msft amp-dev-0101
On modern AMD platforms, the firmware-based TPM is known as AMD fTPM . It is presented to the operating system via the same ACPI interface, which is why Windows still sees it with the MSFT0101 identifier.
Specifically, VEN-MSFT AMP-DEV-0101 is used by the to: If you are running a virtual machine (VMware,
: If you are using Windows 7, this device will often show as "Unknown" because Windows 7 does not natively support TPM 2.0. To fix this, you would need a specific Microsoft hotfix or to disable the TPM in your BIOS settings.
: These operating systems include "inbox" drivers for TPM 2.0, meaning you usually do not need to download a separate file. If the driver is missing, users on the HP Support Community suggest right-clicking the device in Device Manager, selecting "Uninstall," and restarting the PC to let Windows reinstall it automatically. : If this appears as an "Unknown Device"
Restart the PC and repeatedly tap the designated setup key (typically , Del , or F10 ) to open the BIOS Setup Utility . Switch to the Security , Advanced , or Computing tab.
Below are six proven methods, ranked from simplest to most advanced. Start with Method 1 and work your way down.
Disconnect the (and remove the battery if it is external). Unplug all USB peripherals . Hold down the physical Power Button for 30 to 45 seconds .
The hardware identifier ACPI\VEN_MSFT&DEV_0101 (also known as ) refers to the Trusted Platform Module (TPM) 2.0
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