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# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
2 File Associations

.REG File Extension

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Generic Icon
File TypeRegistry File
DeveloperMicrosoft
Popularity
4.5 (15 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategorySystem Files
File Format Description

Updates the Windows Registry when run; custom REG files can be created to alter different aspects of Windows; to create your own registry update file, follow these steps:

  1. Launch Regedit (From the start menu, select Run, type "Regedit")
  2. Select the section of the registry you are interested in modifying
  3. From the File menu, select Export
  4. Choose "Selected Branch" from the Export Range option at the bottom of the window.
  5. Save the file as a ".reg" file.
NOTE: Manually updating the Windows registry is an advanced process and should only be performed if you know exactly what you are doing. Incorrect registry updates may render Windows inoperable.

Program(s) that open .REG files
Updated 2/14/2007

Generic Icon
File TypeRegistration Information File
DeveloperN/A
Popularity
3.4 (5 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategorySettings Files
File Format Description

Stores registration key, serial number, and other user registration information for a certain program; created when registration is completed; referenced by the program when opened to authenticate the user, but not meant to be opened manually.

Program(s) that open .REG files
Microsoft Windows Logo
Windows
Icon Various programs
Mac OS X Logo
Mac OS
Icon Various programs
Updated 6/9/2009