published by microsoft corp. there is a box for allow or disallow and a box that says don't show me this again. But I can't check any box. It totally freezes everything. I did a Norton scan last night showing 0 problems. In fact, I am having no other problems except that I now have to sign in every single dang time I try to get to my homepage. This is a new problem. In face my pc says this Silverlight was not even installed until May of 2012. Please please help. Will it harm anything if I delete the thing? I have a compaq parsario desktop, 6 years old. I am disabled and need simple instructions. Please help if you can.