Connect and disconnect my xperia m4 aqua from the pc

Hi guy's,

Have a problem with my phone, is that to the connect it to the pc the phone is connects and disconnects to each while, have them drives installed, have the pc companion, you "repair" the software if was that what affected but not turned out, you change the version of the 5.0 to it 6.0 thinking that was problem maybe of some file corrupt but nor.

Has anyone had this same problem?
The smartphone is already not in warranty so I can not take it for service.

I leave a video to see the error.