How to Expand a compressed file

This page tells you how to expand a compressed file. 
You need to expand a file when you want to copy just one or two files from distribution disks of a software application without having to reinstall the whole thing.
This situation occurs when you have unsuccessfully installed a program which causes one or two of your system files become corrupted.
The compressed files that comes in the distrubution disks of your program are normally compressed. They have their original names with one character replaced with an underscore ("_"), like ole32aut.dl_ for oleaut32.dll
You can expand a compressed file into its original file using the EXPAND command in DOS window as follows:

open a dos window
change to the directory where the compressed file is located
type: EXPAND compressed-files-name target-directory\expanded-file-name
for example: the expanded name is OLEAUT32.DL_ and you want to expand it into OLEAUT32.DLL in c:\windows\system
you type: EXPAND oleaut32.dl_ c:\windows\system\oleaut32.dll
