You insert the said DVD in your DVD drive (the one which is supposed to come out of the front panel). Note that you need to place the DVD with the shiny side facing bottom.
The computer will detect the DVD & an autorun window will pop-up. From that select "Copy contents of the DVD". Select a path & click OK.
If the autorun does not work, you have to manually go into the DVD in My Computer, right click on the DVD, say copy, select path & click OK.
Or open the DVD folder, select all the contents by pressing Ctrl+A, right click mouse, select copy. Go to the desired folder, right click again & click paste.
Thank you for your helpful advise.