Did you try deleting the contents of the temporary internet files? I keep mine set to delete them on exit from internet exploder (IE). But then, i also block Javascript, and only the barest of the html files makes it. In the tools>options>advanced, I also disabled install on demand. It all seems to help somewhat. I should mention though, this computer is only one of seven that I use, and it's sole function is the netbox. The others aren't on line.