Problem with unknown file type

As you know, in Windows, the file name extension plays a big role in identifying the type of file to which it belongs, such as
. exe: Executable application
. bat: Executable Batch
. cpp:c++ Source Files
. Java:java Source Files
. Class:java byte code file
. Swf:flash Film
. HTML: Hypertext link Markup Language
And so on, and these extensions are also telling Windows what application to open (through the registry).

However, what do we do when a file with an unknown extension appears in a Windows system (that is, its icon is a Windows logo)?

First of all, we should go online Google, input "* * * format", to see the world's largest search engine is with how we say, once found this file format can read the software, immediately again Google again, the software please come up to the hard disk;

Second, if Google can't find it, it will be the second straw: guess. Guess what. Just guess the file format of the document. For example, you know this file is in the video format, then change the extension to. known extensions such as. rm,. wmv,. mpg,. avi Try also to change the extension to a similar test, such as ". Ex_" instead of ". exe", you can run it;

Again, if this is not the case, that is not good, it had to take testing. Boldly use Notepad to open the file to see what it is. If you happen to see the characters you can read, then congratulations, you have opened the file, it also shows that the document itself is a text format; If you are unlucky, you see a lot of birds, then see the last straw bar;

The last one, in fact, is the simplest one, just ignore it. Why, then? Some (probably most) software has its own format file, which is the only software that it can read itself. Just like a child doodle, only his own heart to understand what he painted, for the people around the view of the ignore.