If you see ACPI\MSFT0101 appearing as an "Unknown Device" in your Device Manager, it typically identifies as the Trusted Platform Module (TPM) 2.0 Intel Trusted Execution Engine (TXEE)
. This device is responsible for system security features like BitLocker encryption and secure boot. Recommended Fixes 1. Windows 10 and 11 Users
For modern versions of Windows, the driver is usually built-in or provided via Windows Update. Run Windows Update: Settings > Update & Security > Windows Update
and click "Check for updates." Check "Optional updates" if the device remains unknown. Motherboard/Laptop Support Page: Visit your manufacturer's site (e.g., Dell Support Lenovo Support ASUS Support
) and search for your specific model. Look for drivers labeled: Intel Trusted Execution Engine Interface (TXEI) Intel Management Engine Interface (MEI) Intel Platform Trust Technology (PTT) 2. Windows 7 Users
Windows 7 does not natively support TPM 2.0. You may need a specific Microsoft hotfix to recognize this hardware ID. HP Support Community cant install unknown devices in Device manager
ACPI\MSFT0101 ID refers to the Intel Trusted Platform Module (TPM) 2.0
. This driver is essential for security features like Windows Hello, BitLocker, and meeting the system requirements for Windows 11.
In most cases, you do not need to download a standalone "MSFT0101" installer. Windows 11 and Windows 10 include this driver natively, or it is delivered through specific chipset packages. 1. The Primary Fix: Windows Update
Since this is a Microsoft-standardized ID, the driver is almost always bundled into Windows. Update & Security Windows Update Check for updates Look under View optional updates Driver updates Acpi Msft0101 Driver Download
. If you see "Intel - Security" or "TPM," select and install it. 2. Manual Update via Device Manager
If the device appears with a yellow exclamation mark in Device Manager: Right-click the Start button and select Device Manager Security devices . You should see Trusted Platform Module 2.0
If it's listed as "Unknown Device," right-click it and select Update driver Search automatically for drivers
. Windows will pull the MSFT0101 definition from its internal store. 3. Manufacturer Chipset Drivers
If Windows Update fails, the driver is part of your motherboard's Intel Management Engine (ME) For Laptops (Dell, HP, Lenovo):
Go to the support page, enter your serial number, and download the latest "Intel Management Engine Interface" "Chipset Driver." For Desktop Motherboards (ASUS, MSI, Gigabyte): Download the drivers from the specific motherboard model's support site. 4. Enable TPM in BIOS/UEFI
If the driver won't install or the device is missing entirely, the hardware might be disabled: Restart your PC and enter the (usually F2, Del, or F12). Navigate to the TPM Support Security Chip PTT (Intel Platform Trust Technology) . Save and exit. 5. Official Sources (Avoid Third-Party Sites)
download "MSFT0101.zip" from random "driver update" websites. These are often malware. Only use: Microsoft Update Catalog (Search for "TPM 2.0") Your PC manufacturer’s official support portal. for your laptop or motherboard model?
The hardware ID ACPI\MSFT0101 refers to the Trusted Platform Module (TPM) 2.0 If you see ACPI\MSFT0101 appearing as an "Unknown
, a critical security component used by Windows to provide hardware-based security features. If this driver is missing or shows an exclamation mark in Device Manager, it is typically listed under Security Devices HP Support Community Identifying the Driver identifier is specifically associated with: Trusted Platform Module 2.0
: Necessary for features like BitLocker, Windows Hello, and Windows 11 system requirements. Microsoft Pluton
: In some newer devices (e.g., Ryzen 6000 series or newer), this hardware ID may also be linked to the Microsoft Pluton security processor, which integrates TPM functionality. HP Support Community Troubleshooting and Installation Report 1. Enable TPM in BIOS/UEFI
Before downloading drivers, ensure the hardware is actually active in your system's firmware: Restart your computer and enter the (usually by pressing Navigate to the Look for settings labeled (Intel), or (AMD) and ensure they are set to Microsoft Learn 2. Windows Update
Since this is a standard Microsoft component, the driver is usually included in Windows updates: Update & Security Windows Update Check for updates Optional updates View optional updates , as driver packages are often located there. Microsoft Support 3. Manual Driver Installation via Device Manager If the device appears as "Unknown Device" or has an error: Device Manager (right-click the Start button and select it). Locate the device (under Security devices Other devices Right-click it and select Update driver Search automatically for drivers If that fails, choose Browse my computer for drivers and select Let me pick from a list of available drivers on my computer . Look for Trusted Platform Module 2.0 HP Support Community 4. System File and Registry Repair
If the driver is present but failing (e.g., "Device could not start"), the system files might be corrupted: Command Prompt as Administrator. sfc /scannow to repair system-level driver files. Restart the PC after the scan completes. Driver Easy 5. Manufacturer-Specific Drivers
If you are on Windows 7 or using specific hardware like a laptop, the generic Microsoft driver may not suffice. Visit your manufacturer’s support page (e.g., HP Support Dell Support ASUS Support
) and search for "TPM" or "Intel Management Engine" drivers for your specific model. HP Support Community specific download page for a particular laptop or motherboard model?
Re: Need drivers for Windows 7 - HP Support Community - 6914321 For Intel systems: Intel Chipset Device Software For
Go to your PC manufacturer's support site and download the latest Chipset Driver for your exact model.
If you are staring at your Windows Device Manager and see an entry labeled "ACPI MSFT0101" with a yellow exclamation mark, you are likely frustrated by the lack of a straightforward driver fix.
This guide explains what this device actually is, why standard "driver download" searches fail, and how to fix it properly.
The Trusted Platform Module (TPM) is a critical security component. It provides hardware-based encryption, stores BitLocker keys, enables Windows Hello facial recognition, and secures login credentials. Starting with Windows 11, a TPM 2.0 chip became a mandatory system requirement.
If the ACPI MSFT0101 driver is missing or corrupted, you will experience:
Do not use third-party driver download sites — they often bundle malware. Instead:
Try these steps in order (most likely to fix first).
This driver is important because:
If you have obtained the correct manufacturer driver package but it does not automatically install, you can force the driver manually.
C:\Drivers\TPM)..inf file (usually named tpm.inf, tpm20.inf, or oem.inf).