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- HP Community
- Printers
- LaserJet Printing
- USB Not Recognized Error

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03-31-2017 02:34 AM
Everytime i connect my PRINTER with my PC, Im getting this error popup saying "USB NOT RECOGNIZED". Tried with different ports still same.
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Accepted Solutions
03-31-2017 03:20 AM
Method 2 – Uninstall USB Devices
As a last resort, you can also try uninstalling all USB devices from your system and then restarting. I mention this last because even though Windows is supposed to automatically recognize the USB controllers, hubs and devices automatically, it can sometimes fail and you’ll end up with no USB ports working.
I had a computer with 6 USB ports and only one port would not work properly. I uninstalled everything under USB Serial Bus Controllers in Device Manager and restarted. Instead of re-detecting everything, I was left with no USB port working, so be careful when using this method.
Go to Device Manager and start uninstalling each item from under USB Serial Bus Controllers. Before you start with anything that is already working, uninstall the items with exclamation points or that are listed as Unknown Device.
03-31-2017 03:11 AM
Here are few methods you can try to fix it
Method 1 – Unplug Computer
So how did I finally fix the problem? Well, if you are lucky, it’s a super simple solution! Try this method first and if it works, you’ll have saved a lot of time.
Simply unplug your computer from the power supply. Yes that is it! Note that this does not mean just turning off your computer using the power button because most modern computers don’t actually turn off completely and the motherboard will still get power. This is useful sometimes if you want to remotely wake up a computer, etc.
The motherboard is where all of hardware of the computer connects to, including the USB ports. Sometimes the motherboard needs to be “rebooted” because things can go wrong, i.e. all or some USB ports suddenly stop working. The small microprocessor on the motherboard will reload the drivers and your USB ports should hopefully be recognizing devices again.
So first turn off your computer using the Shut Down option in Windows or pressing the power button and then UNPLUG the PC from the wall outlet. Let it sit for several minutes and then plug it back in.
03-31-2017 03:20 AM
Method 2 – Uninstall USB Devices
As a last resort, you can also try uninstalling all USB devices from your system and then restarting. I mention this last because even though Windows is supposed to automatically recognize the USB controllers, hubs and devices automatically, it can sometimes fail and you’ll end up with no USB ports working.
I had a computer with 6 USB ports and only one port would not work properly. I uninstalled everything under USB Serial Bus Controllers in Device Manager and restarted. Instead of re-detecting everything, I was left with no USB port working, so be careful when using this method.
Go to Device Manager and start uninstalling each item from under USB Serial Bus Controllers. Before you start with anything that is already working, uninstall the items with exclamation points or that are listed as Unknown Device.