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A few months ago I was on websudoku.com and afterwards realized Norton would not run, not update, and I couldn't access mail. I solved that by going safe mode and running Malwarebytes which found two pup files. Once deleted the computer ran perfectly. Yesterday I went back to that site and the exact same thing happened, only this time the problem files were cleared out by two disc cleanup runs. Norton is missing whatever is occurring on this site and I will not be returning to it - as it is able to totally disable Norton access.