File extension CTT (.CTT) information

Windows cannot open CTT files?

If Windows is unable to open file extension .CTT 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 .CTT file extension is associated with Windows Live messenger. Backups of a user's contact list are exported as CTT files. To open .CTT files properly you will need to use Windows Live messenger, however you will be able to view the general content of the files using a text editor.. Incorrect associations are the cause of many file extension errors. Scan your system to prevent, identify and repair CTT file extension association errors.


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  • Drivers: Scan your PC for the outdated drivers which lead to system errors and slowdowns.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