You need to edit the thread you started to questions in order for you to choose best answer.
It's done, I changed it for you. You can now select best answer.
Here's your thread:
http://www.tomshardware.com/forum/44848-63-video-webcam-windows#t188959
You can find you old thread by clicking on "see all" on the bottom right corner on the notification box when it is on the middle tab. The notification box is on the top right corner. You can also find your old thread by clicking you user name on any of your post, then click "Access to the whole list of his/her messages".