Just go to the company's website that made your web cam and download a new driver(the program that makes your webcam work with your computer). You can usually download this program free of charge straight to your computer. My suggestion to you would be to also save this download to a disk so that you will have the disk once again and can use your webcam on other computers, good luck!
P.S.
Make sure you get the exact download for you webcam i.e. model no. and so on because if you don't your webcam may not work properly.
i have a en7410e when comp ia powered on the screen stays blk green light flashes and it takes...
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i have a en7410e when comp ia powered on the screen stays blk green light flashes and it takes approx 20-30 min for ir to come on