I have absolutely no idea if this will help you or not. I found a similar complaint concerning an HP all in one printer. Every time someone in the office opened the scanning bed or inserted a page in the feeder to be copied, every computer in the office had the HP Device Manager pop up appear on screen. The solution was within the printer's own "Information and Settings" icon. The trick was to
uncheck the setting to "Show HP Device Manager when document is..."
When your Nokia is plugged in, see if you have an "Information and Settings" icon or something similar, either in the Nokia Suite or perhaps within the pop up itself (like a "do not show this message again" box.)
Sorry I can't be more help.