File extension O (.O) information

Windows cannot open O files?

If Windows is unable to open file extension .O 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:

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


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  • Drivers: Scan your PC for the outdated drivers which lead to system errors and slowdowns.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