Some BS piece of adware somehow got approved in my system and reset my browser so that whenever I enter an invalid web address, it transfers me to a search page run by Xupiter. The biggest problem is that it seems to take any delay as a failure, and then pushes me to this site. I've re-installed Norton, but this isn't a virus, probably just a modification I approved while swatting pop-ups. Does anyone know how to undue this? Thanks in advance.

Al