The reason why the camera can not start may be the antivirus software to disable the camera, disable the cancel on the line.
Steps:
1, first of all, open the desktop 360, enter the 360 main interface, and then select the right side of the function of the book in the "more".
2, then see the following list of features, in the list of out to find the "Trojan Firewall", and then click in.
3. After entering the Trojan Firewall, click on the "Settings" option on the far right.
4. Then go to 360 Trojan Firewall - Settings and click on the "System Defense" option.5, and then click on the following "webcam protection", turn on the no-disturbance protection, so that when you open the webcam again, the problem is solved.