Why Win Explorer launch for external drives during boot?

[Cuzzinbrucie]

I'm running Win10 on an HP laptop. I have 3 external HDD attached via USB ports. Every time I boot the PC, a Windows Explorer window opens for each of the 3 drives. How do I prevent this from happening?

 

[Jim Wilde]

Control Panel>Autoplay>Select an appropriate setting for "Removable drive" (it's likely set at the default, which is to open File Explorer). Choosing "Take no Action" should stop the problem.