The hardware ID ACPI\MSFT0101 refers to the Trusted Platform Module (TPM) 2.0
, 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 Acpi Msft0101 Driver Download
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
The hardware ID ACPI\MSFT0101 refers to the Intel(R) Trusted Platform Module (TPM) 2.0
, a chipset component crucial for security features like BitLocker drive encryption. kb.stonegroup.co.uk
While modern operating systems like Windows 10 and 11 usually include this driver out of the box, it frequently appears as an "Unknown Device" on older systems like Windows 7 or specialized hardware. System Center Dudes Identifying the MSFT0101 Device The MSFT0101 ID is a signature for the Intel Platform Trust Technology (PTT) The hardware ID ACPI\MSFT0101 refers to the Trusted
. This technology emulates TPM 2.0 functionality without needing a separate hardware chip. It is most commonly found on systems with Intel Skylake (6th Gen) processors or newer. Microsoft Learn How to Fix the "Unknown Device" Error
If your Device Manager shows a yellow exclamation mark for ACPI\MSFT0101, use the following methods to resolve it: cant install unknown devices in Device manager
Here is the useful, practical information you need — not just a link, but how to get the correct driver and what to do if it shows a yellow exclamation mark.
In up to 80% of cases, the ACPI MSFT0101 error appears not because the driver is missing, but because the TPM is disabled in the BIOS. When disabled, Windows sees the hardware ID but cannot load the driver.
Steps to enable TPM:
F2, Del, F10, or Esc—check your screen or motherboard manual).F10).After enabling, boot into Windows. Open Device Manager, click Action > Scan for hardware changes. The yellow exclamation mark should disappear automatically because Windows includes a generic TPM driver. Restart your computer
Once installed correctly via Windows Update:
If you have enabled TPM in BIOS, installed the chipset drivers, and manually forced the INF file but the error persists, try these advanced solutions:
If you search for "ACPI MSFT0101 driver download", you will find dozens of scam sites (DriverGuide, DriverEasy, etc.). Avoid them. They often bundle malware. This device does not have a universal downloadable driver.
Microsoft does distribute TPM drivers, but only through Windows Update as part of firmware (System) updates. These are not found under "Optional Updates" as a standalone driver.
How to get it via Windows Update:
If you see nothing there, proceed to Method 3.