A family of Microsoft relational database management systems designed for ease of use.
I wanted to put out one more bit about securing your DB but first why was SQL not an option? The express version is free and holds so much more data then Access. There are more then I am will to type right now but here are some of the high lights to help you out.
Note: some of these are VBA coding. I can help with that.
Remember, this is for the copy you are going to deploy! A lot of these will make it so you will not be able to get back into it. Always have backups.
- Hide database window shut down special keys The settings are here:

Of course the database is a big deal and some special keys allow you to bypass these options on start up (getting to that). Things like F11 that brings up the solutions list and holding shift down while opening the database to release it.
- Next you shut down that shift key! I know you don't work with VBA a lot yet but that is the only way I know to do it. It uses the "AllowBypassKey property...ie -Shift. There is a method to use a Macro though. That is a big piece. if you want the code i will send it.
- Take away the objects. Navigational Plain, Menus, etc. You can do that in options. Makes it much harder to get to things.
Last but not least...the actual database where the information is held. That of course is a dangerous one. even more so because in a lot of chases it is a file that can even be deleted, not uninstalled. Be very careful with this one and for sure do not keep them in the same place.
As far as the login problem with the code. Feel free to post it so i can take a look if you would like.