I just don't know what is wrong. Everything I plug in the wheel mouse, it just goes crazy, it open task bar and start menu properties, you know, the one from start>settings>task bar, opening by itself over and over again, and the pointer just going crazy, running all over the desktop. I have download wheel mouse driver from Microsoft, it still doing the same crazy thing. I can't even control the pointer. I have tried to plug in another wheel mouse, still the same thing. My system is w2K, computer is toshiba 490XCDT. I know it is an old computer, but it should not have anything to do with driving the mouse crazy?? Anyone knows why it happen???