Dongle - recognition problem!
In this case, it is recommended that you try to replace other USB interfaces first. If not, it is recommended that you try to change a machine, because it may be caused by the system, and it is possible. If not, then consider the reason for the encryption dog. If the driver is used, you can try to use Master Lu or the latest version of the driver, To drive your life, you must download the latest version from the official website.
There are two main reasons for this situation. One is that you delete the USB driver of the dongle when you use the software (360, QQ housekeeper and other software may delete the USB driver of the dongle when cleaning up); Secondly, the software you installed conflicts with the USB driver of the dongle (the USB driver of some USB products such as USB flash disk conflicts with the USB driver of the dongle. If you have used these digital products, the USB driver of the dongle will be replaced by the USB driver of these products, which will cause the dongle cannot be displayed normally).
Some are unloaded and reloaded, but some are unrecognized after shutting down the machine
That is, you can disable the startup of related items in the system settings. You can enter "msconfig" in "run" to start the startup of related items. Will not use "msconfig", you can use 360 or QQ housekeeper software boot boot option settings, boot boot dog related projects.
Check if there is a problem with the dongle. Try plugging the dongle into another computer. If there is the same fault, it should be confirmed that it is the physical damage of the dongle itself, and contact the software manufacturer to replace it.