Cannot Open Extend.dat


  1. prsnrs
    Posts : 23
    Win 7 Pro 64 bit
       New #1

    Cannot Open Extend.dat


    Upon opening Outlook 2007, I received the following error - "Cannot open file extend.dat." Apparently, one solutioins is to change that file to extend.old. When I tried that fix I received another message that I didn't have the proper administrative authority. I am the Administrator and no one else uses my computer. Why can't I change this folder. BTW, after restarting my computer yet again, the first error message was gone. What gives?

    Thanks.

    PRS
      My Computer
    Quote Quote

  3. osholt
    Posts : 1,241
    Windows 7 Profesional x86, Mac OS X 10.6 Snow Leopard
       New #2

    Hi, there are a couple of things you can try:

    Take Ownership of that file, a tutorial on how to do so is at Take Ownership of file - Vista Forums.

    Do a System Restore, the tutorial can be found at System Restore - Windows 7 Forums.

    These should be a good place to start.

    Oli
      My Computer
    Quote Quote

 

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