.reg

File Type 1 Generic IconRegistry File
File Format Standard (developed by Microsoft)
Usage Open manually; may run a program or script when opened
Rank ★ ★ ★  Common
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.
Important: 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.

Open With
Windows

IconMicrosoft Registry Editor

Updated 2007
File Type 2 Generic IconRegistration Information File
File Format Standard
Usage Referenced by an application; not meant to be opened manually
Rank ★ ★ ☆  Average
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.

Open With
Windows

IconVarious programs

macOS

IconVarious programs

Updated 2007
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