I have LR4 installed on my laptop (Intel Core i5, 8G RAM). Everything was working fine for months, and then recently, when I plug in a USB thumb drive to one any of the USB ports, LR4 automatically opens and opens to the Import window. This started happening about a month ago during a time when I was not using LR. I use this thumb drive daily just to save Word documents, so LR opening each time is becoming somewhat annoying.
I can't find anywhere in Preferences where LR can be set to open by default to the Import window when a thumb drive is placed in a USB port. Is there a way to fix this.