I have an HP pc and an HP mouse, keyboard, and monitor. But, my mouse is totally backwards. if i scroll down ACAD scrolls out if i scroll up ACAD scrolls in. If i press the pan button, it will stick zoom in place. I really need to figure this out, i have tried researching it on google, even on here. I cannot get any of my work done with out this fixed. (I am using ACAD 2011 Mechanical Engineering edition). Any help will be greatly appreciated!!!