PC will not detect USB devices

Occasionally I come across systems that will no longer detect USB devices when they are plugged in, no matter which port they are connected to.

If this happens to you then the first step should always be to shut down your system completely and remove power. This will free up any of the USB hardware that nay be ‘hung’ resulting in them appearing non-responsive.

If, after a complete cold re-start, the USB ports are still not detecting any devices connected you should check out the ‘Selective Suspend’ settings on your system.

This feature is usually enabled by default on systems as it can conserve energy and extend battery life. However, in some circumstances this process can also cause the USB ports to get locked up. In this case you should turn off the ‘selective suspend’ feature. To do this…

Open your Control Panel and Select Power Options


Click on Change Plan Settings for the plan that you have selected


Click on Advanced Power Settings


Expand the USB section

Click on the drop down

Select Disabled


Click OK

Reboot your PC.

If the ‘selective suspend’ was the culprit then you should now be able to access your USB port.

Hope this helps someone out.

Taff Lovesey
www.lovesey.net (fantasy novels author site)

About taffybach

Author of the young adult fantasy novel series, The Portal Chronicles, including The Spider Gem and The Shimmering Gate. When not writing and promoting Taff runs a small IT support company, LITES PC based in Bourne UK.
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