Display Please waite message

In your main form's Load event, show another form that says to wait. Then put a BackgoundWorker in the main form and do the processing (backup?) in the thread. When the processing is done, the task completion code can close the other thread.

You can do all that in the main form without a thread but that won't look professional.

If you show the other form using ShowDialog instead of Show then the main form cannot be used until the other form is closed, and I assume that you do want to do that.

Sounds like you want a splash screen? Here is a good article http://www.codeproject.com/KB/cs/prettygoodsplashscreen.aspx

Application.DoEvents();
label.Text = ""Please wait...";