Peripheral guide
Troubleshoot a USB device before replacing it
Last updated September 30, 2026
A failed device, failed port and Windows enumeration problem can look similar.
Change one variable at a time
Try a known-good port, then another computer if possible. Avoid changing ports, hubs, drivers and cables simultaneously.
Remove hubs from the test
Connect directly when possible because marginal cables or unpowered hubs can cause intermittent disconnects.
Check Windows device state
If Windows reports a device problem code, investigate that before buying replacement hardware. A Plug and Play rescan is a conservative first step.