Almost every page, there are occasional pages that it doesn't show up on. For example I read the bible on line at BibleGateway.com, going from chapter to chapter, most have it but some don't. I'm not currently getting it but history tells me that it will be back.
Something else I failed to mention is that when I have it, it also takes over my wife's IPhone and my 13 year old son's Xbox.
Do you have an open WiFi connection? If you do, put a password on it to keep neighbors from using it just in case someone else's computer is the problem. Then post 15 by Boogieman has some very good instructions.