Edit Excel VBA program to incorporate a problem work-around

I have an small existing Excel based program that was created entirely within Excel VBA. It accepts system time/date input upon pressing a “start” button and again for a “stop” button and then calculates the interval period and records it along with other data into an Access database file. Occasionally the system time freezes within the program for some reason and while the start time is always accurate, the stop time will always be the same as the start time and the elapsed time will show zero minutes because of the freeze. There is no consistency to the problem and I cannot reproduce the failure upon demand. I have, however, discovered a work-around that I would like to incorporate into the program to effectively fix this bug. The existing “stop” button stops and records the elapsed time and proceeds to a different page to allow additional input. Upon an instance when the time freezes, if I hit “stop”, go to that page, but then hit “back” the system time immediately adjusts itself and unfreezes. I can then immediately hit the “stop” button again and now my final entries will all be with the correct times. This seems to work even if I make this stop-back-stop sequence very quickly. I want someone to change the function of the “stop” button to incorporate this sequence into its function, if possible. The new “stop” button would function as it does now, except that within ½ second or so it would go “back” and within another ½ second or so return to the “stop” page to wait for the additional input as normal. Another consideration is that the existing code is password protected and the original programmer has forgotten what the password is. The included copyright material and license agreement clearly shows ownership in my name. It would be nice if the password were removed, but not absolutely necessary.