Does anyone happen to know if there is a way that I can block a user from chaning the file extension on a access database. The project that I am working on allows me to put a copy of a form on someones desktop that lets them fill in the information and upload it to my database. The file that I place on there desktop is .accdr. Works great. But if someone changes the file extension to a .accdb then they can get into the database and find out where the information is being stored. I know by default file extensions are hidden but a lot of my employees have them shown and know how to show them. I know I should have designed this database in SQL but I am not to good at that haha. Any advice would be greatly appreciated.