Question on USB camera

Users questions: Last day for the first time after starting the machine, the system will not recognize the camera, showing unknowndevice, and then in the Device Manager to uninstall the equipment inside, and then restart the look just fine. Can see the camera head. This is how we talk about it? How to solve? Tried reinstalling drivers, changing access I, no use.
Experts answer:USB equipment, one common problem is difficult to solve.
  • This information provided by the users.Thanks!