File extension USR (.USR) information

Windows cannot open USR files?

If Windows is unable to open file extension .USR you may have registry related errors or may not have the appropriate program installed. We strongly recommend that you run a free registry scan.

Appropriate program:

The .USR file extension identifies files containing user and other information, needed for accessing Pegasus Mail. In this context to access a .USR file you will need to install Pegasus Mail.. Incorrect associations are the cause of many file extension errors. Scan your system to prevent, identify and repair USR file extension association errors.


  • Performance: To optimize memory and CPU usage for USR files run a free performance scan.
  • Stability: Fix USR errors to make your system and applications more stable.
  • Drivers: Scan your PC for the outdated drivers which lead to system errors and slowdowns.

You are currently viewing the detail page for ABF file extension. This page contains a detailed description of the ABF file type, software tools to help resolve file association errors in the Windows registry together with relevant system utility applications and other related information.