USB or Universal Serial Bus is an apparatus to institute communication between devices and a host controller, in this case, for personal computers. USB was manufactured and created by Ajay Bhatt while he was employed by Intel. USB was invented to substitute many types of serial and parallel ports, and can be attached to computer peripherals like external hard drives, flash drives, private media players, digital cameras, keyboards and mice.
USB has emerged as the universal connector for these devices, and although it was first intended for personal computers, this apparatus has been integrated into other gadgets such as PDAs, smartphones and video game consoles, and also used as a power cord for charging purposes. Latest surveys show that more than 2 billion USB devices are sold each year, and a whopping 6 billion sold altogether.
The term USB device not recognized translates as the personal computer may not be able to identify the USB device plugged into the computer. When USB device is not recognized, the appliance may or may not be listed in Device Manager as an unidentified object.
The causes of USB device not recognized could be due to several issues such as a malfunction in the host controller hardware, inaccurate USB driver versions, absent support for USB2.0, or supplementary system hardware or designs that may alter the timing. This problem could also arise due to attached hubs and devices.
To rectify the problem, the presently connected USB should be unplugged as it is quite probable that the connection is not secure and has unfastened. Re-plug the USB device firmly into the corresponding port and the problem should go away. This is one of the more common reasons for USB device not recognized.
Another method to employ is to scan for hardware alterations in the Device Manager. Use the Device Manager to check for new and freshly inaugurated hardware. Using the start menu, choose the run option, and type ‘devmgmt.msc’ in the pop up box and click ok. At the action menu, click scan for hardware abnormalities. These actions will instruct Windows scan to detect if any alien devices are placed.
The next step is to seal all opened Device Managers and control panels. Check to see if the computer is able to recognize the USB device. To disable the power management on the USB hub, click start and the run; once again, type ‘devmgmt.msc’ in the pop up box and click ‘ok’. Spread out the USB controller’s node and trail these paces for each USB Root Hub listed.
These steps comprise right-clicking the USB Root Hub, and then clicking on properties, followed by clicking the power management tab. When this is completed, click to clear and switch off the device to save the power check box. Finally, click ok.
Do take note that if this method is employed on laptops, the battery life may be compromised.
At times, by just unplugging the USB device and switching off the computer for half an hour or so, and then re-start the computer might just eliminate the dilemma.