My disc drive is tsstcorp cdrwdvd ts-h492c and i was burning dvds just fine when i was running windows xp but a few days ago i upgraded to windows vista home premium and now its now its telling me "medium not present" Ive searched other forums but cant find anything similar to my problem. Im using Memorex DVD+R and like i said i was burning DVDs just fine until i went to vista.. now im just confused. any suggestions?