Failed to update .mdf database because the database is read-only (Windows application)

Question

I\'ve created a database windows application using in C#. My application is running successfully on Windows XP, but it doesn\'t properly execute on Vista or Windows 7 system

Answer 1

go to the folder Where the program is installed and right click on the database file and Properties -> Security -> Group or Username (Click users one by one and see below for the permissions)

If for the user if not set to full control, then click EDIT -> Select the user and give full control..