If the root hub is displayed with an exclamation point (!) in a yellow circle, verify that the BIOS is assigning an interrupt request (IRQ) to the root USB controller. Check Device Manager to be certain that the root hub is functioning correctly. Many hardware problems (such as high or low power, bandwidth shortage, malfunctioning or incorrectly-configured firmware, and so on) can cause issues to occur. If the device is plugged into a secondary hub, unplug the device from the hub, and then plug the device directly into the root hub. If another computer that you know is working correctly is available, try to plug the device into that computer to see whether you encounter the same issue. Be aware that it may be more difficult to identify which device is malfunctioning or is configured incorrectly. In most of these instances, you must physically turn off the computer and turn it back on to reset the bus. Malfunctioning or incorrectly-configured hardware Typically, if you plug a malfunctioning or incorrectly-configured device into a USB port, it causes the computer to stop responding (hang).

Plug in the removable USB device, and then test to make sure that the issue is resolved.

Restart the computer, and then reinstall the USB controllers.

Right-click every device under the Universal Serial Bus controllers node, and then click Uninstall to remove them one at a time.

Expand Universal Serial Bus controllers.

Click Start, click Run, type sysdm.cpl in the Open box, and then click OK.

To attempt to fix your USB problem manually, follow the steps below or click here to: To fix your USB problem automatically to download our driver installer utility, then run the download and follow the steps in this wizard.

Incorrectly-configured root hub To fix your problem automatically in Windows, to download our driver installer utility, then run the download and follow the steps in this wizard.

Out-of-date firmware or basic input/output system (BIOS).Malfunctioning, incorrectly-configured, or missing device driver.Malfunctioning or incorrectly-configured hardware.However, you can trace most USB problems to one of the following conditions: Because USB devices are Plug and Play devices, there is little that you can do to control or configure them. Should you choose not to save the application, you may simply initiate the free scan by clicking the 'Run' button on the File Download Window. We recommend that you save it to your desktop and initiate the free scan using the desktop icon. You will need to click Run to install the application. Important: If you are using Internet Explorer as your browser, a browser Security Warning dialog box displays like the one below. Follow on-screen prompts to complete installation.Click 'Run' ('Save As') if using Firefox.Click above Download link or to begin installer download.Driver Cm23e Usb Rf Transmitter Average ratng: 3,5/5 66reviews

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