There are others but I will address those later. This one is really aggrevating. Every so often for no reason my hand/fingers will lock in a position, or just do not respond to my commands of what I want them to do. Example - smoking a cigeratte - tell my fingers to losen up, but they don't, I have to remove cig, and then flex hand. It will happen within seconds. Holding a mouse the other night lifted my hand off and it stayed in the position it was around the mouse, fingers would not staighten, the Ol' Man came over and straighten them, hadn't even had my hand on the darn thing for a sec to click on one place. I hope I am explaining this correctly. It is just so darn irritating.