After disabling TPM, the ACPI MSFT0101 device will disappear from Device Manager because Windows will no longer see it. This is not a "driver fix," but it removes the error entirely. Only do this if you do not use BitLocker or other TPM-dependent security features.
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100% safe, works on all versions of Windows 7, requires no downloads. Cons: Disables the TPM functionality entirely.
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Open (press Win + R , type devmgmt.msc , and hit Enter). Find the Unknown Device (usually under "Other devices").
Open the Start menu, right-click Computer , and select Properties . Look under "System type" to see if you have a 64-bit (x64) or 32-bit (x86) operating system.
However, you are in luck: this is typically not a sign of a hardware fault, but simply a compatibility quirk between newer systems and the older Windows 7 software. This guide provides a complete, free solution to help you resolve it. After disabling TPM, the ACPI MSFT0101 device will
: It provides secure credential storage and key management, primarily used for drive encryption. : Unless you are using Windows 7 Ultimate or Enterprise
After entering Windows, check the Device Manager. The yellow exclamation mark next to the unknown device should be gone. You have prevented Windows 7 from even seeing the hardware, thus eliminating the error.
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Searching for "acpi msft0101 driver windows 7 free download" will lead you to many shady websites offering , DriverBooster , or DriverPack Solution . These are dangerous for several reasons:
Solved: Compatible driver Windows 7 - 64 bit drivers - HP Support Community - 7608236
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