Change File Extension In Windows

How to Rename File Extensions 
A lot of people  may ask how to rename a file extension in windows .

There are two ways to rename a file extension .


Number 1,

•   Tools
•   Folder Options:
•   Click the view tab  
•   Make sure ‘Hide file extensions for know files’ is not selected
•   Press OK

Now go into a folder and notice you can see your files extensions, rename them to whatever you'd
like, for instance:

Ex:
Dildos.exe  to  Dildos.txt


Number 2,
MS-DOS:

The difference between renaming files in DOS is that you can rename multiple files rather then one
 at a time .

For examples.

• Go to your start menu 
• open run, then type “cmd” without parenthesis. Ok you’re in MS-DOS right?
• Find ur file Directory

 Ex:
cd C:\Files\


It may wont exist on ur PC ,
If everything goes will dos will look kinda like this:

Code:
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\User>cd C:\Files\


If all fails, you perhaps didn’t type in the correct folder/name and it will look like this:

Code:
C:\Documents and Settings\User> >cd C:\Filse\
The system cannot find the path specified.

Code:
C:\Files>dir
 Volume in drive C has no dildo.
 Volume Serial Number is CXXX-XXXX

 Directory of C:\Files

02/01/2005  07:22 PM    <DIR>          .
02/01/2005  07:22 PM    <DIR>          ..
01/31/2005  06:40 PM            14,336 st.bmp
01/31/2005  06:40 PM            14,336 st02.bmp
               2 File(s)         28,672 bytes
               2 Dir(s)  39,024,766,976 bytes free

C:\Files>


Did you notice how I had two files named st. Since both of these files have the same extension, *.bmp they can be renamed all together. If there are other files in there without he same extension and you don't want to rename them, move them to another folder and / or directory.

Last but not least, after listening to my horrific grammar type:

Code:
C:\Files>ren *.bmp *.rar


And your results are:
Code:

C:\Files>dir
 Volume in drive C has no penis.
 Volume Serial Number is CXXX-XXXX

 Directory of C:\Files

02/01/2005  07:37 PM    <DIR>          .
02/01/2005  07:37 PM    <DIR>          ..
01/31/2005  06:40 PM            14,336 st.rar
01/31/2005  06:40 PM            14,336 st02.rar
               2 File(s)         28,672 bytes
               2 Dir(s)  39,024,676,864 bytes free

C:\Files>]