Hi,
Today am going to tell you how to troubleshoot when your USB or Usb Keyboard is not recognized or malfunctioned.
Just follow these steps your problem will be fixed...............
METHOD 1: Use Device Manager to scan for hardware changes
Use Device Manager to scan for hardware changes. After your computer scans for hardware changes, it might recognize the USB device that is connected to the USB port so that you can use the device.
To scan for hardware changes, follow these steps:
Click Start, and then click Run.
Note If you are running Windows Vista, click Start, and then use the Start Search box.
Type devmgmt.msc, and then click OK. Device Manager opens.
In Device Manager, click your computer so that it is highlighted.
Click Action, and then click Scan for hardware changes.
Check the USB device to see whether it is working.
If scanning for hardware changes fixed the problem, you are finished. If this method did not fix the problem, go to Method 2.
METHOD 2: Restart the computer
If scanning for new hardware did not fix the problem, try restarting the computer. After the computer has restarted, check the USB device to see whether it is working.
If restarting the computer fixed the problem, you are finished. If this method did not fix the problem, go to
METHOD 3: Disable and re-enable the USB controller
Use Device Manager to disable and re-enable all the USB controllers. This lets the controllers recover the USB port from its unresponsive condition. The USB controllers represent the USB ports in Device Manager. If you are not comfortable with advanced troubleshooting, try the steps in the "Workaround" section.
To disable and re-enable the USB controllers, follow these steps:
Click Start, and then click Run.
Note If you are running Windows Vista, click Start, and then use the Start Search box.
Type devmgmt.msc, and then click OK. Device Manager opens.
Expand Universal Serial Bus controllers.
Note You might have to scroll down the list to find this item.
Right-click the first USB controller under Universal Serial Bus controllers, and then click Uninstall to remove it.
Repeat step 4 for each USB controller that is listed under Universal Serial Bus controllers.
Restart the computer. After the computer starts, Windows will automatically scan for hardware changes and reinstall all the USB controllers that you uninstalled.
Check the USB device to see whether it is working.
If the USB port recognizes the device and if you can use the device, you are finished.
If this method fixed the problem, you are finished. If this method did not fix the problem, go to the "Workaround" section.
If none of these methods worked for you, you can disable the Selective Suspend feature. However, be aware that when the Selective Suspend feature is disabled, all USB host controller drivers (and therefore all USB ports and connected USB devices) in the system are affected. Therefore, your computer cannot suspend any USB devices that are connected to it, and the USB devices can continue to use power while connected to the computer. Additionally, the Allow the computer to turn off this device to save power check box does not appear on the Power Management tab for the USB Root Hub
To disable, Selective feature just follow these steps
1 Click Start, click Run, type regedit, and then click OK.
2 Locate and then click the following key in the registry: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\USB
3 On the Edit menu, point to New, and then click DWORD.
4 Type DisableSelectiveSuspend, and then press ENTER.
5 On the Edit menu, click Modify.
6 Type 1, and then click OK.
7 Restart the computer.
If the value of the DisableSelectiveSuspend registry entry is set to 1, the Selective Suspend feature is disabled.
Thanks for reading!!!!!!!!!
Today am going to tell you how to troubleshoot when your USB or Usb Keyboard is not recognized or malfunctioned.
Just follow these steps your problem will be fixed...............
METHOD 1: Use Device Manager to scan for hardware changes
Use Device Manager to scan for hardware changes. After your computer scans for hardware changes, it might recognize the USB device that is connected to the USB port so that you can use the device.
To scan for hardware changes, follow these steps:
Click Start, and then click Run.
Note If you are running Windows Vista, click Start, and then use the Start Search box.
Type devmgmt.msc, and then click OK. Device Manager opens.
In Device Manager, click your computer so that it is highlighted.
Click Action, and then click Scan for hardware changes.
Check the USB device to see whether it is working.
If scanning for hardware changes fixed the problem, you are finished. If this method did not fix the problem, go to Method 2.
METHOD 2: Restart the computer
If scanning for new hardware did not fix the problem, try restarting the computer. After the computer has restarted, check the USB device to see whether it is working.
If restarting the computer fixed the problem, you are finished. If this method did not fix the problem, go to
METHOD 3: Disable and re-enable the USB controller
Use Device Manager to disable and re-enable all the USB controllers. This lets the controllers recover the USB port from its unresponsive condition. The USB controllers represent the USB ports in Device Manager. If you are not comfortable with advanced troubleshooting, try the steps in the "Workaround" section.
To disable and re-enable the USB controllers, follow these steps:
Click Start, and then click Run.
Note If you are running Windows Vista, click Start, and then use the Start Search box.
Type devmgmt.msc, and then click OK. Device Manager opens.
Expand Universal Serial Bus controllers.
Note You might have to scroll down the list to find this item.
Right-click the first USB controller under Universal Serial Bus controllers, and then click Uninstall to remove it.
Repeat step 4 for each USB controller that is listed under Universal Serial Bus controllers.
Restart the computer. After the computer starts, Windows will automatically scan for hardware changes and reinstall all the USB controllers that you uninstalled.
Check the USB device to see whether it is working.
If the USB port recognizes the device and if you can use the device, you are finished.
If this method fixed the problem, you are finished. If this method did not fix the problem, go to the "Workaround" section.
If none of these methods worked for you, you can disable the Selective Suspend feature. However, be aware that when the Selective Suspend feature is disabled, all USB host controller drivers (and therefore all USB ports and connected USB devices) in the system are affected. Therefore, your computer cannot suspend any USB devices that are connected to it, and the USB devices can continue to use power while connected to the computer. Additionally, the Allow the computer to turn off this device to save power check box does not appear on the Power Management tab for the USB Root Hub
To disable, Selective feature just follow these steps
1 Click Start, click Run, type regedit, and then click OK.
2 Locate and then click the following key in the registry: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\USB
3 On the Edit menu, point to New, and then click DWORD.
4 Type DisableSelectiveSuspend, and then press ENTER.
5 On the Edit menu, click Modify.
6 Type 1, and then click OK.
7 Restart the computer.
If the value of the DisableSelectiveSuspend registry entry is set to 1, the Selective Suspend feature is disabled.
Thanks for reading!!!!!!!!!
