Use the Device Manager to clear old device information (such as USB flash drives, COM, and NICS)

Outdated devices will delay the speed of the system in some situations. Whenever the system adds new devices, the system will keep the device driver and device information for quick search next time, but this also brings about many problems, such as sometimes someone else's USB flash drive is used once, it will leave information; sometimes the old device information will conflict with the new device. There are many ways to clean up such information on the Internet, most of which are cleaning the registry, manual cleaning is troublesome, and automatic tool cleaning is not at ease, in fact, Windows Device Manager comes with this function, it took ten years to Win the two days to discover and Share it with everyone.

 

In fact, it is very simple, it is an environment variable. After performing the following batch processing, select"Show Hidden Devices"You can see that the cleaning controllers are on ;):

@ Echo offsetDEVMGR_SHOW_NONPRESENT_DEVICES = 1Start devmgmt. msc

 

P.S.

I used this method to solve the problem of Bluetooth COM port conflict and clear the old USB flash disk information.