Another Galaxy J5 issue!

I cannot connect my J5 to the W7 computer with the supplied cable. I have installed the Samsung SideSwtich software and sometime it works. I have reinstalled it, and it even shows under the StartUp tab in msconfig.

But usually, nothing; cannot transfer anything.

The more annoying issue is that when I was using XP, I never had to install additional software and the phone connected to the computer with no issues.

I don't know what to do next? Any advice gratefully received.

Thanks and toodle pip