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What to do when excel cant open a file xslx for mac install#
What to do when excel cant open a file xslx for mac full#
What to do when excel cant open a file xslx for mac software#

Step 2. If Excel opens normally, check for any add-ins that are causing problems in Excel. Press Windows+R keys, type excel.exe /safe, and click "OK". Loading Excel without templates and add-ins allows you to see if the program works as it should or if it is corrupted. Before you follow the solutions, check if Excel is working normally. Here, we will show you all the possible solutions, and you can try these until your issue is fixed.

It usually indicates the file is not compatible with the Excel version of the file that has come corrupt or damaged. Verify that the file has not been corrupted and that the file extension matches the format of the file." "Excel cannot open the file 'filename.xlsx' because the file format or file extension is not valid. Sometimes, when you try to open or edit an Excel file in Microsoft Office 2003, 2007, 2010, 2013, 2016, 2019, or 365, you may encounter the following problem:

What to do when excel cant open a file xslx for mac full#

Full stepsĮrror "Excel Cannot Open the File Because The File Format or File Extinction Is Not Valid" Start Office Excel > click File and Open > select the inaccessible Excel file. Open Microsoft Excel and go to "File" > click Export and choose Change File Type.

What to do when excel cant open a file xslx for mac software#

If you choose to disable extension hardening, please exercise caution when opening Excel files from other people and ensure that your virus protection software is up-to-date and is set to scan all files before you download or open them.Launch EaseUS Data Recovery Wizard, and then scan the corrupted or damaged Excel files.

Excel extension hardening, while considered a nuisance by many, does serve an important purpose as it relates to information security.

What to do when excel cant open a file xslx for mac install#

So when you install Excel service packs or other periodic updates, you may find that you need to re-enable this setting by changing the registry value back from 1 to 0.

Excel has a tendency to undo this setting.

This option is the most robust, but does come with a few caveats:

Verify that the data has the value "0" (again, without quotes):.

Type "ExtensionHardening" as the name (without the quotes) if it's not already listed.

Right click in the right window and choose New > DWORD.

Navigate to HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\OFFICE\16.0\EXCEL\SECURITY (Your version number will vary based on your year of Excel.

Open your Registry ( Start > Run > regedit.exe).

Alternatively, you can manually change the extension of your exported file from XLS to XLSX before opening it, and it should pass Microsoft's security screening.Ī more robust approach is to disable Excel's validation of XLS vs. So, if you export to CSV or XLSX instead of to XLS, you may have better luck. You may still get the following warning, but can dismiss it more easily:ĬSV and XLSX file formats do not fall victim to the same security warnings from Excel. Launch Excel first and then go to File > Open to open the XLS file. To remedy this issue, there are several options: This mismatch between format and extension causes Excel to generate a security warning, which can sometimes freeze Excel. This is because some platforms save their Excel files in an internal XLS X format, but create files with an external XLS (no X) extension.

If you are exporting to Excel from a third-party platform such as Salesforce or Planisware, you may find that you have issues opening files with an *.xls extension.