Drive with burned dvd shows as if dvd empty

HI. I have burned a movie about a year ago into a dvd and my
dvd (r/rw) drive played it smoothly. Recently, I tried to watch this dvd but the drive behaves as if the dvd is empty- it’s what it says when I double click it. Then I try to burn something into this dvd through nero but then and only then nero says that the dvd is not empty. Whats the problem?
thank you

sounds like a software problem.

Start up in SAFE MODE and try to access the disk.

If it works then you know its a software problem.

If you have Alcohol or InCD installed, uninstall them.

Thanks. Ill try it