changing an ".ost"file to open with "unknown" application


  1. objects
    Posts : 1
    windows 7 Ultimate 32 bit
       New #1

    changing an ".ost"file to open with "unknown" application


    I changed my outlook email .ost file to open with auto cad by mistake. Initially it was opening with an Unknown application. How can I enable it to open with an unknown application again? please help
      My Computer
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  3. carwiz
    Posts : 4,161
    Windows 7 Pro-x64
       New #2

    You can try this tutorial and see if it helps.

    Default File Type Associations - Restore
      My Computer
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