File extension C39 (.C39) information

Windows cannot open C39 files?

If Windows is unable to open file extension .C39 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:

C39 is a file extension associated with Quicken Ace files. Incorrect associations are the cause of many file extension errors. Scan your system to prevent, identify and repair C39 file extension association errors.


  • Performance: To optimize memory and CPU usage for C39 files run a free performance scan.
  • Stability: Fix C39 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  • Drivers: Scan your PC for the outdated drivers which lead to system errors and slowdowns.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.