My pages won't load- I keep getting a "cannot display this webpage...."?

One of two things could've happened: You might need to reset your Internet connection [unplug wires and plug them back in accordingly,] or it could very well be a virus. If that's the case, I suggest downloading, installing and updating the freeware program MalwareBytes' AntiMalware. That program helped me when I had a stubborn virus on my computer and I have been recommending the program to other people since.