Computer doesn't recognize it. Both USB Ports

replace the usb connector then tried to hooked up to the other usb port.

some cameras need to have the software installed on the computer, did you install the software? depending on the age of the computer some devics can be power hungry on usb ports and so will come up as unrecognised devices, ive expirienced this myself. or last but not least the camera has a faulty usb controller inside, there are a few reasons but the worst one is when its the computer is an old one and the usb ports just dont have enough power to run the camera.

1. Try a different USB port. If other ports recognize it, then the original port is fried. 2. Try a different computer. If the other computer does not recognize it, then your flash drive is damaged.

Good Luck!

The two most likely causes for this is either your USB port or the USB cable itself. Try plugging the device into different ports and if that doesn't work, get yourself a different USB cable. If neither of those works then your device is faulty and the only fix for that is to get it serviced by the manufacturer.

Have you tried more than 1 USB device?

Hi, Are you getting a "USB device not recognized" error whenever you plug in a USB mouse, keyboard, or other USB device? I love USB and have 5 ports on my computer so that I can connect my mouse, keyboard, camera, phone, and printer to it all at once!

However, last weekend, my computer stopped recognizing my USB devices! The strange thing about it was that the USB ports were not bad because all of my devices were still getting power to them. I could still charge my cell phone without a problem!

usb device not recognized

So I started with the normal fixing methods, including uninstalling the drivers for my devices and reinstalling them. That didn't work! Next I tried System Restore thinking that maybe I had installed something and it caused a conflict with the USB system drivers. That didn't work!

I read online that in order to fix this problem I should go to Device Manager and uninstall all of the devices under USB Controllers. Restarted the computer, reinstalled the USB drivers, but the problem STILL did not go away!

You may also see in Device Manager that the device shows up as an "Unknown Device".

unknown usb device

So how did I finally fix the problem? Well, apparently it's a super simple solution! No need to edit the registry, uninstall drivers, or anything of that sort.

Simply UNPLUG YOUR COMPUTER FROM THE POWER SUPPLY. Yes that's it! Note that this does not mean just turning off your computer because modern computers don't really turn off when you press the power button as the motherboard still gets power.

First to explain, the motherboard is where all of hardware of the computer is connected to, including the USB ports. Sometimes the motherboard needs to be "rebooted" also because something can go wrong, i.e. all your USB ports suddenly stop working. The small microprocessor on the motherboard will reload the drivers and your USB ports should be back to recognizing all devices!

So first turn off your computer using Shut Down or pressing the power button and then UNPLUG it from the wall outlet. Let it sit for about a minute and then plug it back in.

Hope this helps someone fix that pesky "USB device not recognized" Windows error!


Have a nice day...

Check it on another computer. if it still doesnt work then your backup is gone. if it does work maybe you should take it in. also try other accessories in that same port. if other stuff doesnt work then you'll probably need to fix the port. also check the drive on any USB ports in the back of you pc.

Regards

There are few things to remember using USB.

• If your System is in hybernation mode, don't remove any attached USB device, because it will damage your USB driver. This is one of the known problem from microsoft.
• If you have to remove any USB device use 'Safely Remove Hardware'.

To remove currepted USB drivers its not enough to remove your printer drivers.

1. You should un-install the 'Universal Serial Bus Controllers' from Device Manager.
2. Then re-boot to clean registry.
3. Install the 'Universal Serial Bus Controllers' using XP Setup CD.
4. Then check the Mass storage, PDA etc, it should recognized by XP.
5. Then install printer driver (don't attach printer to system untill setup finish or setup says to connect).

I think it will fix.
Please let me know your feed-back.

Thanks
Iqbal

You'll want to verify your computer recognizes your usb ports.
In device manager, look to see that you don't have anything with an exclamation mark, question mark, or red X on it. Make sure you have the usb ports listed under Universal Serial Bus controllers. If nothing shows, your usb ports may be dead. Depends on the age of your computer and what might have happened to them.

Device manager- right-click My Computer and go to properties, then select the hardware tab.

Make sure you are matching the compatibility of USB 1.1 and USB 2.0 between the devices (computer and USB devices).

USB 1.1 device will work in USB 1.1 and USB 2.0, but USB 2.0 devices will not work in USB 1.1 plug in the computer.

How many USB ports do you have in the computer? Which ones have you tried other pen drives in? List the USB ratings for each device and port in the computer to further help.

Have the other USB devices been formatted with other computers? The formatting on other systems might not be compatible.