Application is slow after install on another pc

I have build a WPF application with SQLite. After create setup project in visual studio and install it on my developer machine, app works perfect. But when my client install it on another computer it's works very slow. I added project output and SQLite.Interop.dll for database to setup project. Also one of my .dll is COM dll.

This application communicate only with SQLite database.

I have noticed that application works fine but with admin rights on client computer.

What can be the reason of this?