I just had one of those experiences where all my USB ports stopped working for no apparent reason on a new (3 months old) computer. No USB device were recognised except my mouse.
So I went to the various help forums and was terrified by the potential problems and some of the suggested solutions, many of which I quite simply didn’t understand because I am NOT a computer expert. Everything was suggested from running hardware maintenance checks in Windows (I use Windows XP as Operating System) checking the BIOS, to replacing the motherboard, to reconfiguring software, to buying new USB ports on a PCI card.
Many other visitors with the same problem had tried these (often expensive) options to no avail.
And then I came across a simple suggestion that, at a stage when all the (non-replacing) software and hardware checks and options had failed, was worth a try.
About halfway down the page, after other more technical and expensive options came a suggestion from a user called jonahpro:
Switch off the computer, unplug the mains cord for a few minutes, reconnect the mains and reboot.
It sounded too simple but I tried the suggestion and it worked for my computer. Everything now works perfectly again … THANK YOU JONAHPRO!
So, if your USB ports suddenly stop working for no apparent reason, or they suddenly fail to recognise USB devices when they’re plugged in, why not try this simple solution?
It won’t work in every case. There may be other significant underlying causes. You may need to replace some hardware (such as a failing motherboard) or reconfigure some software, or adjust the BIOS etc and I’m certainly not suggesting that you ignore these if you need them.
I’m suggesting that by first unplugging your computer from the mains for a few minutes and then reconnecting and rebooting, you may just save yourself a lot of time, money and sleepless nights.