Troubleshoot and fix unresponsive USB ports on your Windows PC with these simple solutions, from basic checks to driver updates and power settings tweaks.

To determine the power, current, and voltage of a USB socket, Windows on-board tools, freeware, and test sticks from $10 can be used.

USB ports are everywhere today, but their design means they can be susceptible to dust and dirt if unused. Here's how to clean your USB ports.