Files renaming as unrecognizable when downloading..
 

Everytime I try to download a file, the file extension renames itself or something and becomes unrecognizable to the computer. It acts like there is no program to open that type of file. I have to manually select the program to open each file. This never used to happen. If I downloaded an audio file, it would show as a media player or real player file when downloaded. Now it shows as "music (1)" and I have to manually select the program to open that file. I'm sorry if I'm repeating myself, I'm just new to this and want to make sure that I explain myself correctly. Thanks for any help you can give!