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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with the error code "ACPIMSFT0101" in Device Manager on your Windows 7 or Windows 10 system, it indicates a missing or outdated driver.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:
- 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.
- Download the hotfix: Locate and download the Microsoft hotfix for the "ACPIMSFT0101" device from the Microsoft Support website.
- Run the hotfix: Extract the downloaded hotfix and run the executable file. This should install the correct ACPI driver for your system.
- Restart your computer: Once the driver is installed, restart your computer to complete the installation process.
- 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.
Lenovo Support
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