Thank goodness someone with sense wrote this blog. I had a 'frozen' cursor on my Dell Inspiron and all the other websites provided instructions which required me to move the cursor to click on this or that. Grrrrrrrr! If I could move the friggin' cursor to click on their 'solutions,' I wouldn't need their 'solutions!' Only this comment (above) made any sense and, in fact, perfectly restored my offending cursor:

"There is a button on the keyboard [in between the F12 key and the Insert key] that enables and disables the trackpad. Try pressing that and see if the mouse works again." (It did!) Thanks for perfect, and sensible, advice!!!!