Unknown File Extension???

As the topic suggests I have a file which I do not know its extension..

Does anyone here know of a file browser other that the one installed in windows?
ie: when you click open --> use web service to find appropriate file

its like viewing the known extensions. and then deleting the extension of the file. After accepting changes it just says "File" lol.

Itll should only say File if it doesnt have an extension. Yours doesnt have a .ext?? If so then you may be SOL. Whats the name of the file?? Where did you get it?? I know that sometimes when I get Torrent files from TorrentReactor it doesnt put the .torrent at the end sometimes and it just comes up as just File.

Its okay I used TrID.net and it came up with avi. Problem solved. It turned out to be a porno clip lol. I was like expecting mp3s.