I have a verizon galaxy s6 with marshmallow on it. Used to I could just connect to my pc and browse my phone on it no problem to drag off pictures, videos or see all the file folders. I updated to marshmallow a couple days ago and I hooked it to my pc today. When I hook it up I know it is because its starts charging off the pc but windows 7 gives me new device noise like usual, no dialouge box, no nothing. What do I need to do?