Here we go. Let's run a check first to see if the insert key is functioning correctly. Make a cube > select the W hot key for move>select the insert key to enable edit pivot point>grab the yellow square with the dot in it and try and move it in the front, top, or side views>then select insert key to disable edit pivot point. If this works then Maya is configured properly and there is something else wrong, But if this doesn't work then give this a try.

1) Select your object>double click quickly on the move tool icon, this will open your move tool attribute editor>select reset tool.

2)Go to Window>Settings/Preferences>Preferences>Edit>Restore Default Settings>Click Save at the bottom.

3)Go to Window>Settings/Preferences>Hot Keys>Click Restore Defaults>Click Save.

4)Close Maya

5)Reboot your computer and open Maya, try it again to see if it fixed the problem.

Good Luck!