Most likely you are connecting the microscope when it is powered on. If you do this, Windows operating system (OS) will show a message “installing device driver” that may persist for minutes before finally changing to “device driver not found” as the OS gives up.
If you plug in the microscope while it’s off, most of the time the messages “installing device driver” and then “USB mass storage device driver installed successfully” will appear. Windows file explorer will show the microscope an external drive, such as G: or H: The microscope will power up when the USB is connected and a USB symbol will show on its LCD screen.
If this does not happen when you plug in the turned off microscope or if the USB mass storage device message appears and you can’t find the microscope as a drive in file explorer, use the Windows tool to safely remove the USB drive (microscope). Unplug the microscope. Turn off the microscope. Turn off your PC. Now connect the microscope to the PC.
Turn on the PC. As it boots, the microscope will come to life showing the USB symbol on the LCD. After the computer boots, you will be able to see the microscope as a drive in file explorer.