Every time I try to download anything, the process proceeds to 99% and, then, stops. I get a message that says the item could not be downloaded and an immediate iexplorer failure -- "session ended unexpectedly" then a message stating an attempt to locate the problem flashes on for a split second and disappears. Then, I'm off the internet staring at my screen. I can't find any message or diagnostic of the problem. Norton flashes on verifying that the "downloaded" file is "safe," but there has been no download???