You feel the same way I feel.
If you press insert while typing, it turns on overwrite letters, so if you see that you have left a word out or made a mistake, you go back and correct it, but it then deletes all the letters after the mistake, so the only way to fix it is to press the insert key again.(Yeah well you try explaining it!)
I don't know if there is any way to disable it, but last time I ran to the kitchen, pulled a sharp knife out of the drawer, and came screaming back and ripping the insert key out.(True Story : Never go near me when I hit the insert button)
Now my insert key is deformed on the table next to me.:bigsmile: :bigsmile: :bigsmile: :bigsmile: