When a peripheral is connected to a computer, the operating system reads its descriptors to identify the proper system-level drivers. Each block of the string serves a precise role:

USB hubs can get stuck in an un-responsive logic loop due to minor static or power surges. Unplug the USB device entirely from the computer. Shut down your computer.

This came from a cheap USB programmer/TTL adapter purchased online. No markings on the PCB.

Isolate the operating system's software layer from the physical ports by forcing a complete reset of the USB hub stack. Press Windows Key + X and select .

Budget-friendly, non-powered 4-port expansion hubs.