Excel not opening an attached in Outlook email

By skos
Feb 26, 2009
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  1. Excel not opening an attached in Outlook email

    Here is a good one. I have an external hard drive hooked up via USB that I use as a backup.

    Recently I can not open an attachment in excel that is attached in an email. If it does, it is a web page. If I save to the external hard drive and try to open it through Win Explorer I can’t.

    However if I launch Excel, then do the open command and try that newly saved file it on external hard drive, it opens.

    Anyone? What’s up?
  2. Tedster

    Tedster Techspot old timer..... Posts: 10,074   +13

    file may contain a macro or virus. It might be protected, it also might be corrupted. Do you know the sender or creator?

    Are your file associations good in your registry. Run CC cleaner registry repair.
  3. jobeard

    jobeard TS Ambassador Posts: 13,348   +300

    Here's a few of the critical reg entries for Excel
    Code:
    HKEY_CLASSES_ROOT\.csv    default reg_sz Excel.CSV
    HKEY_CLASSES_ROOT\.csv\Excel.CSV\ShellNew
    HKEY_CLASSES_ROOT\.xls Content Type   reg_sz application/vnd-ms-excel
    HKEY_CLASSES_ROOT\.xls\Excel.Sheet.8
    HKEY_CLASSES_ROOT\.xls\Excel.Sheet.8\ShellNew   Filename reg_sz esxcel9.xls
    
    HKEY_CLASSES_ROOT\AppID\{00020812-0000-0000-C000-000000000046}   (default) reg_sz Microsoft Excel Application
    HKEY_CLASSES_ROOT\AppID\EXCEL.EXE   AppId reg_sz {00020812-0000-0000-C000-000000000046}
    
    HKEY_CLASSES_ROOT\Applications\EXCEL.EXE\shell\Open\command   (default) reg_sz "C:\Program Files\Microsoft Office\Office\EXCEL.EXE" /e
    HKEY_CLASSES_ROOT\Applications\EXCEL.EXE\shell\Open\command   command reg_multi_sz [COLOR="Red"]4FC!!gxsf(Ng]qF`H{LsEXCELFiles>xlT]jI{jf(=1&L[-81-] /e[/COLOR]
    
    the last one is clearly a hash and may be dependent upon your environment
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