You can get to Device Manager by clicking on Start and typing in devmgmt.msc or by going to Control Panel and clicking on Device Manager.In that case, you should right-click on Unknown Device, click on Properties, then the Driver tab and then click Update Driver.If this doesn’t work, you can also try to download the driver for your device from the manufacturer’s website. Method 2 – Update Device DriverIf Windows is not able to recognize the device, you may also see in Device Manager that the device shows up as an “ Unknown Device”. Let it sit for several minutes and then plug it back in. 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.Method 4 – USB Root HubAnother thing you can try is to open Device Manager, expand USB Serial Bus Controllers, right-click on USB Root Hub and then click on Properties.Click on the Power Management tab and uncheck the Allow the computer to turn off this device to save power box. If no USB port recognizes the device, then keep reading because it’s probably something else. If the device is recognized by a different USB port, there could be a hardware problem with one of the USB ports. Once you have restarted, try to connect the USB device that was causing the problem.If that particular USB port doesn’t recognize it, try another one. Method 3 – Restart & Disconnect USB DevicesThe next thing you can try is to disconnect all USB devices and then restart the machine. However, if you are installing a USB printer, drawing pad, etc, then it might be worth downloading the driver for that specific device.
![]() ![]() Napraw Windows Xp Home Edition Sp3 Online Driver For YourAfter removing the hub and connecting the device directly to the computer, it worked just fine.We haven’t really been able to find any other solution to this problem other than reducing the number of items connected to the hub. He only had three USB ports on his computer, so he bought a hub where he could connect an additional 8 USB devices.I guess this proved too much for his computer and it just started sporadically not recognizing various devices. Method 5 – Connect Directly to PCA friend of mine ran into this issue and the cause ended up being his USB hub. If it does recognize the device, then leave them unchecked. If not, go back to the power management tab for each one and check the box again. Try to reconnect the USB device and see if it is recognized. It’s a free tool that works with Windows XP, Vista and 7.You can either have the troubleshooter fix the problems for you or select the fixes yourself. Method 6 – USB TroubleshooterIf nothing has worked so far, you can download the Windows USB Troubleshooter Fixit tool. Make sure to install this hotfix if running Windows 8. Microsoft has released a fix for Windows 8 not detecting USB devices properly. Right-click on the first one and choose Update Driver Software.When the update dialog pops up, choose Browse my computer for driver software.Then click on Let me pick from a list of device drivers on my computer at the bottom.From the list, select Generic USB Hub. On some computers, you might see two, three or more of these. Open Device Manager and then expand Universal Serial Bus Controllers.You should see at least one item called Generic USB Hub. Method 7 – Update Generic USB HubIf you are getting the Unknown Device error in Device Manager, you can also try one other thing. Perilaku organisasi robbins dan judgeInstead 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. I uninstalled everything under USB Serial Bus Controllers in Device Manager and restarted. 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. Method 8 – Uninstall USB DevicesAs a last resort, you can also try uninstalling all USB devices from your system and then restarting. If it’s still showing as not recognized, then you repeat the process for each Generic USB Hub listed. Click Next and then click Close once it finishes installing it.At this point, the Device Manager screen should refresh and either the unknown device will still be there or it may now be recognized. ![]() If not, just buy a new cheap USB cable from Amazon: A to B, A to Micro B, A to Mini B, or A to A. This is a fairly rare problem, but I have seen it occur a few times over my many years doing technical support.Possible Solution # 2 – Another possible solution is to take the device, connect it to another machine and if it does recognize the device properly, to then eject it properly from that computer before reconnecting it to the original computer. If not, then it’s definitely an issue with the device.Possible Solution #1 – The other possible solutions are to try a different USB cable, if you have one lying around. The best thing to do is to connect the device to another computer and see if it works or not. Other Possible SolutionsIf nothing has worked until this point, it’s pretty safe to say there could be a problem with the actual hardware. Amd radeon hd 6570 drivers downloadIf not, post a comment and I’ll try to help. The only thing you need to make sure is that you have a PS2 port on your computer, otherwise you won’t be able to do anything once you disable USB in the BIOS if your keyboard and mouse are connected via USB.Hopefully, one of the many solutions above will solve your USB problem. You can also go into the BIOS and disable USB, restart the computer and then enable USB again. I’ve already written an article about whether it’s a good idea or not to update the BIOS, but in this case, it might be worth a try. After connecting them to another computer and ejecting them properly from there, they suddenly started to show up on the original computer that was not recognizing them.Possible Solution #3 – A few people have had luck getting rid of this problem by updating the BIOS.
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