File Type Generic IconRegistry File
File Format Standard (developed by Microsoft)
Usage Open manually; may run a program or script when opened
Popularity ★ ★ ★ ★ ★  Popular

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

IconMicrosoft Registry Editor

Published 2007
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Information from the PC File Extensions Reference