I tape some shows of TV on to DVD-R and DVD-RW but have not finalize it and have put the DVD in my DVD drive of the computer but the computer will not recognize it , when I click on my computer on the dvd drive it just shows it is a black disk nothing there , but when I right click on the dvd drive and click on properties it shows no space available on the disk.

This is so strange.

Note I tried windows media center ,Quick play ,windows movie maker and pinnacle studio and all of them show it has a black disk or no DVD in the DVD drive when in fact there is.