Mouse requires many tries and much persuading to highlight words or string of text, or not inadvertently do what I don't want done - don't want to rearrange text for instance. For instance, try to highlight a word within text. It may highlight whole line of text, of may not leave highlighting intact when pointer moved away to take desired action, eg 'copy'. So I have to repeat my action, maybe more than once. Pointer overly sensitive and unreliable. I am always 'undoing' stuff because of the dicky pointer or trying same little action ten times before it 'sticks'. Any solutions that don't include harming myself?