A:AnswerYou can't. The unit is designed to be self-holding and there's no way to keep it from retracting if it's gotten too loose. Your best bet would be to make a claim on the 1-year warranty.
A:AnswerShort answer is Yes. Long answer is if you are trying to use it with your laptop's integrated camera, chances it will only enhance the exposure but the quality of a laptop integrated camera for the most part has usually pretty low quality in the image it produces. But yes you use it anyways. It is USB powered so you can either connect it to your laptop or use your smart phone charger to plug this light through there as well.
