Fix Unknown Device With Error Code Acpimsft0101 In Device Manager

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ACPI Device Not Recognized in Windows 10 (Solved)

Fix Unknown Device with Error Code ACPIMSFT0101 in Device Manager

Troubleshooting Steps for Windows 7 and Windows 10

If you encounter an "Unknown Device" with the error code "ACPIMSFT0101" in Device Manager on your Windows 7 or Windows 10 system, it indicates a missing or outdated driver. Follow these steps to troubleshoot and resolve the issue:

1. Check your BIOS: Ensure that your PC's BIOS is up-to-date. Older BIOS versions may not support the ACPI driver required for this device.
2. Download the hotfix: Locate and download the Microsoft hotfix for the "ACPIMSFT0101" device from the Microsoft Support website.
3. Run the hotfix: Extract the downloaded hotfix and run the executable file. This should install the correct ACPI driver for your system.
4. Restart your computer: Once the driver is installed, restart your computer to complete the installation process.
5. Check Device Manager: After restarting, open Device Manager and check if the "Unknown Device" has disappeared and the ACPI device is now recognized.

Note: This solution is specifically for devices with the error code "ACPIMSFT0101". If Device Manager shows different error codes or descriptions, refer to the manufacturer's documentation for specific troubleshooting instructions.

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