Computer not showing phone details

[AC Question]

I've recently got a new phone ( Samsung S7 ) and when I connect it to my computer (Windows 7 ) the mouse stops working and I have to switch the box off and on again to be able to use it. I did manage to get it working once (not sure how) but although the camera showed up as a drive, it didn't show the memory card or Internal stuff so I couldn't have look at anything. I tried a different mouse and had the same problem. When I connect it to my laptop (Windows 10 ) everything's fine. I didn't have this problem with any other phone I've had.
Hope someone can help me because at the moment I'm having to download stuff to the lap top and the transfer it to the PC which is a pain !!
Thank you x