Ever had a file on your hard drive without an extension? Don’t know which program to use to open it?
This is a usual scenario for many computer users. Fortunately, there is still hope. One of the easiest ways to find out the format of the file is to use a software called TrID. TrID is a small, freeware utility that can make an attempt at finding out the format of the suspected file. It has a huge library (more than 5000 file formats) that it uses to search and match the format of the file. It shows with results with percentage of successful match.
Give it a try by downloading it from : http://mark0.net/soft-trid-e.html