Start --> Right Click
Select Properties --> Select Properties
Select Taskbar --> Click Customise box
Click "Show hardware devices" (Some times you may see 'No title'. Select that)
Select "hide when inactive" (on the right)
Change it to "always hide"
This will allow you to use 'Add New Hardware' in Control Panel.
"always hide." This will allow you to use add new hardware, you can then delete the devices
To know what is a MTP device? click here.
Click here to know what is MTP?