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HP Compaq/EliteBook/ProBook Notebook PCs - Unknown Device in Device Manager with Description "ACPI\IFX0102\4&28738126&0"

Issue

Device Manager reports an unknown device with description ACPI\IFX0102\4&28738126&0 in Microsoft Windows XP.

Solution

To resolve this issue, perform the following steps:

  1. Log on to the HP website.

    Click here to access the HP website at http://www.hp.com.

  2. Download the latest HP Embedded Security for ProtectTools and Infineon TPM Driver.

  3. Once the driver is installed, the unknown device message should not reflect.

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