Alternatively, if you do not use BitLocker or specialized security features, you can safely in your BIOS/UEFI settings to remove the error from Device Manager. 3. Manufacturer-Specific Drivers
An outdated BIOS can sometimes cause device recognition issues. Motherboard manufacturers regularly release BIOS updates that improve hardware compatibility and stability, including for the TPM. If updating the OS and chipset drivers doesn't solve the problem, updating the BIOS is a logical next step.
If you see an exclamation mark next to this ID in your Device Manager, it typically means the driver failed to initialize or isn't supported by your version of Windows.
Once you have completed these steps, you can verify that the error is gone: Open . The "Unknown Device" should be gone. acpi ven-msft amp-dev-0101
Right-click on (or the unknown device with the exclamation mark) and select Uninstall device .
How are you sending anything?
The primary symptom is the presence of a next to a device in the Device Manager . When you view its properties, you will see one of several error messages: Alternatively, if you do not use BitLocker or
If you see this ID in your Device Manager with a yellow exclamation mark, it typically means:
But the logs told a different story.
Look for one of the following terms (the name changes based on your CPU): Once you have completed these steps, you can
If the security architecture is disabled or partially provisioned at the motherboard level, the hardware will present its ACPI ID to the OS, but Windows cannot completely initialize the security subsystem. 2. Operating System Incompatibility
Restart your computer. Windows should automatically detect and install the driver from its internal database. 2. Windows 7: The Hotfix Solution