Hi Dawn, my name is XXXXX XXXXX I can assist you with your question today!
Unfortunately, the secure code feature on the Garmin devices cannot be removed without either 1 of 3 methods...
1. Enter the PIN code designated by the original user - i.e your daughter in law
2. Take the device to the security location - a location that your daughter in law would have set in to the device along with the pin, when securing it
3. Send the device off to Garmin for them to remove
By the sounds of your question, you are unable to do the first 2 steps, and so your only viable option if you wish to use the device is to send it off to Garmin
This is stated on the Garmin website:NOTE: If you forget your PIN and your security location, Garmin Product Support cannot unlock the GPS over the phone. You must send the device to Garmin for service. Please contact Garmin Product Support for further assistance: http://www.garmin.com/us/support/contact
If you click the above link and select Europe from the 3 tabs, you can click to Email Garmin customer support and explain your situation. They will reply with an address and time frame for you to send them your device and have it returned with the secure code removed.
I hope my information has been useful and I wish you all the best in getting your device up and running, and I also wish to offer my condolences for the situation you had described.
If you need anymore help with anything I have already mentioned or further assistance with anything more please feel free to reply and I will try my best to aid you.
If you are however happy with the information I have given, please could you take a moment to rate my help, as I would very much appreciate it :)
Hello again Dawn,I see you have viewed this question recently, and just wanted to make sure that you were happy with the answer I gave you since your question is set to close in a days time.If you were happy would you mind taking a second to rate my service between a 3 and a 5 so that I can receive credit for the help :)Thank you very much, and I hope everything is going okay for you!As always if you want to ask any additional questions please feel free to reply within this question.