Update a field if something else is true! (1 Viewer)

[fraser1978]

I'm stuck! Trying to uncheck a checkbox field if another field login_time is five minuets in the past.

Somthing like : -
Update [field{in_out}] if time() > [another field {login_time}]+ 5 {mins}

It must be possible, but I've never tried getting Access to do anything like this.

Any clues please...