This component is not a traditional peripheral but rather a chipset component found on modern Intel (Skylake and newer) and AMD motherboards. It provides:
The Acpi Msft0101 Driver is responsible for facilitating communication between the operating system and ACPI devices, such as power management controllers, thermal management devices, and other hardware components. This driver enables the operating system to control and manage these devices, ensuring efficient power consumption, temperature regulation, and overall system stability.
If you cannot get the driver to work, or you're using Windows 7 32-bit (for which no hotfix exists), you can simply disable the TPM 2.0 feature in your BIOS/UEFI. The unknown device will disappear.
Fixing errors related to the ACPI MSFT0101 identifier involves updating firmware and device drivers simultaneously. Step 1: Verify Enablement in BIOS/UEFI
A yellow exclamation mark will appear in the Windows Device Manager. It usually sits under the tree or inside the Unknown devices section accompanied by: Code 10: This device cannot start. Code 28: The drivers for this device are not installed. Upgrade Failures -NEW- Acpi Msft0101 Driver 77 2021
If you tell me your (e.g., Lenovo ThinkPad X1 Carbon Gen 9, Dell Inspiron 15 5510), I can give you the exact official driver link.
TPM handles encryption keys, Windows Hello, BitLocker, and — critically — Windows 11 compatibility checks .
In late 2021, Linux distributions also saw updates to handle this device ID, occasionally reporting a "Device or resource busy" error (-16) if the system's TPM was already claimed or misconfigured. Troubleshooting & "Unknown Device" Issues
Locate the device with the yellow error icon (usually under Security devices or Unknown devices ). Right-click the device and select . Choose Browse my computer for drivers . This component is not a traditional peripheral but
For older systems, you may need a specific hotfix, such as KB2920188 , to add TPM 2.0 support to the operating system. Troubleshooting Common Errors
Select or "Microsoft Trusted Platform Module 2.0" . Click Next to finish the installation. Troubleshooting & Important Notes
The hardware ID points directly to an essential security component in modern computers: the Trusted Platform Module (TPM) 2.0 . If you see a yellow exclamation mark next to this ID in your Windows Device Manager, or if you are trying to clean-install an older operating system on newer hardware, installing the correct driver version is critical for system stability and security.
The system must be running in UEFI mode rather than Legacy/CSM for PTT to function correctly. If you cannot get the driver to work,
ACPI\MSFT0101 device ID refers to the Intel Platform Trust Technology (PTT)
Have questions? Check your manufacturer’s support forum for “ACPI MSFT0101 Driver 77” – thousands of users have confirmed this fix. Backup your data before modifying TPM drivers.
Locate , fTPM (AMD), or Intel PTT . Set it to Enabled or Active . Save changes and exit. 2. Install via Windows Update (Recommended) Open Settings > Update & Security > Windows Update . Click Check for updates .
While Windows manages the core driver, manufacturers (like Lenovo or HP) occasionally release ACPI driver packages to ensure better compatibility with specific hardware configurations.