Welcome to the forum
If you don’t have a DVD burner/player, you can’t rip at all a DVD disc, because CD burner/players are not able to read DVD discs (except for combo drives, that can read DVDs but can write only CDs).
So the first step is buy a new drive. Nowdays a DVD burner is not really costly (around â‚¬20-30).
Once you have the disc on your hard disk, then you can use DVDx as suggested by [B]CCromeo[/B] or AutoGK (another free and easy to use software) any other software you like to convert the movie into an AVI