While struggling to get rid of the win7 security 2012 virus I believe I accidentally deleted a registry key that had to do with my internet instead of one of the ones for the virus. I am not very tech savvy but I can navigate around a computer fairly well with the right guidance. I did not make a copy of the registry keys before attempting to edit them, and for some reason I have no restore dates before I made this mistake to use system restore. Now whenever I open my internet browser (internet explorer 8) I receive a: internet explorer cannot display this webpage. I have connectivity with my router but limited access. I tried trouble shooting and got a message saying there was an error with the DNS. I would appreciate any help that I can get. Possibly just a list of what registry keys could possibly cause just my internet to go down. If I can find out which one I deleted I should be able to manually type it in.