Solutions for computers that do not recognize USB devices

USB is not recognized, the computer does not recognize the USB device solution! USB devices to store and transfer data we have brought a great de convenience, the office staff basically have a U disk, now we are around more and more deusb equipment, and there are more and more problems, software hardware problems also followed, Then let's analyze the causes and solutions of the USB device failure

Analysis of the reasons why the USB device cannot be seen in the system

1. System or BIOS problem. USB devices cannot be identified in the system when you disable USB in the BIOS or operating system. The solution is to turn on the USB device associated with the de option. On the system boot press F2 or DEL key, into the BIOS, the Enable USB device select Enable.

2. The front USB cable is not properly connected. This type of failure occurs when the motherboard is connected to the DEUSB line and the Chassis de front USB interface, which is also a fairly dangerous de, because the positive and negative connection is likely to cause the USB device to burn. So as far as possible using the chassis back to the Deusb interface, but also less use extension lines. It may also be a problem with the fracture, a USB port to see.

3.USB interface voltage is not enough. When the mobile hard disk is connected to the front USB port, it is possible that the system cannot recognize the device de fault. The reason is that the power of mobile hard disk is relatively strict, the front interface may not provide enough de voltage, of course, inferior de power may also cause this problem. The solution is to move the hard drive do not connect to the front USB interface, replace the inferior low power de power or try to use external power de hard box, if conditional de words.

4. Motherboard and system de compatibility issues. Hehe This kind of breakdown most famous de is the NF2 motherboard and Usbde compatibility problem. If you are in the NF2DE motherboard to encounter this problem de words, you can install the latest DENFORCE2 dedicated USB2.0 drive and patches, the latest de motherboard patches and operating system patches, but also not the de words try to refresh the motherboard Debios generally can be resolved.

5. In the USB read and write must not unplug it, otherwise it may burn equipment. XP in the taskbar more than the USB device de icon, open the icon will be shown in the list of U disk devices, choose to deactivate the device, and then you unplug the device, this will be more secure.

In fact, to judge the software hardware problem is very simple, in the de machine or change a system to try on it. Some small de problems may be first formatted with specialized software. And to remind everyone to choose Fat in Windows format, do not select FAT32.

Hint that USB device repair is not recognized

The following are some other scenarios that may affect the USB device's normal working de:

(1) USB Device has failed (same de condition can be used before, now there is a problem);

(2) There is a problem with the USB interface, such as a. USB front interface polarity, which may cause the USB device burned down, so be sure to carefully look at the motherboard instructions, to prevent access to the wrong; B. The interface voltage is not enough, some mobile hard disk often have such a de problem, the host behind the Deusb interface tends to be more reliable than the front USB interface; C. Motherboard and operating system compatibility problems, the installation of the latest De motherboard driver to maximize the avoidance of such problems; USB devices are disabled in D.bios and may be resolved by changing the corresponding de settings in the BIOS; E. Operating system problems can be solved by reinstalling the operating system;

(3) There is a problem with the USB driver: If there is a problem with the driver, it should be guaranteed to install the corresponding model de latest driver or confirm that the operating system does not need to install a special de drive, the latest de drive can be found from the online device manufacturer de home page.

When a problem occurs with a USB device, in addition to looking for a solution based on the actual de error message, it is also important to look closely at the USB device de specific brand, model, manufacturer, and include this information when searching for results, which will make it easier to find the corresponding de solution. Like some plug-and-pull effort needs to be in a constant state of connection DEUSB devices temporarily fail, the operating system constantly appears "unrecognized USB devices" such as annoying de prompts, you can temporarily shut down the Universal Serial Bus controller in the Device Manager of the corresponding DEUSB port or prohibit the corresponding DEUSB device.