Find "Universal Serial Bus controllers," right-click your Generic USB Hub, and select Update driver Uninstall device (Windows will reinstall it automatically on reboot). The Verdict While it's just a small file in a sea of system data, usbhub.sys

Most system drivers are dry, predictable blocks of code. But fusbhubsys

This feature introduces an intelligent power management system for the USB hub. Unlike standard hubs that provide a static maximum current (e.g., 500mA or 900mA) per port regardless of the system's power state, this driver-level feature actively monitors the host system's power source (AC vs. Battery) and thermal status to dynamically allocate power to downstream ports.

Windows Update often misses specific manufacturer hub drivers. Open . Expand Universal Serial Bus controllers .