How to Fix the "ACPI\MSFT0101" Unknown Device in Windows 7 If you’ve recently downgraded a newer laptop to Windows 7 or performed a fresh install, you’ve likely encountered a stubborn "Unknown Device" in your Device Manager. Checking the reveals the culprit: ACPI\MSFT0101 .
You must install the Microsoft hotfix KB2920188 , which adds native support for TPM 2.0 to Windows 7 and Windows Server 2008 R2. System Requirements: Acpi Msft0101 Driver Windows 7
: Your system must be running in UEFI mode , and you must be using Windows 7 64-bit ; the 32-bit version is not supported . How to Fix the "ACPI\MSFT0101" Unknown Device in
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