Dlusb-c120.exe — _best_

is not a standard Windows system file. Instead, it is a third-party driver installer executable, primarily associated with USB-to-UART bridge controllers manufactured by Silicon Labs (Silicon Laboratories) and distributed by various hardware vendors.

If malware is found, quarantine the file. After removal, reinstall the legitimate driver. dlusb-c120.exe

Are you experiencing a specific when trying to run this file? Product Support - C120 | Acer United States is not a standard Windows system file