I downloaded a Minecraft world but its level file is a power media player file and I don't know how to fix it [closed]

When I open Minecraft in the single player section it is not there and I have tried to find out how to make it a normal file but I'm just lost at this point I have been unable to play downloadable world's forever now and I don't know what to do.

Place the directory containing the level file in your Minecraft saves directory. This is typically in your hidden appdata directory on Windows, so it is available at the path %appdata%\.minecraft\saves. Then, restart Minecraft.

As for the level file appearing as a PowerMedia file, it has to do with how Windows stores the type of a file. Windows stores file types by adding a dot and a few letters, called the extension; the extension is normally unique to the file type. The Minecraft level file has an extension of "dat", for data. PowerMedia, however, says, "Hey guys! I can open .dat files!" And Windows says, "Okay PowerMedia, I'll write down that .dat files are your thing!" which causes Windows to show that it's a PowerMedia file.