In the past days, Excel will caution over the disconnect between the file and contents but open without Protected View security. No, where there is a problem, there is a solution. Several easy fixes can deal with your issue and enable you to open those files again. If there is nothing changed after double-clicking the target excel file, or, the excel program starts up but it comes with a blank white screen, you may try to right-click on the file and select Open.
Maybe you should further choose Workbook after selecting Open to solve the problem. If the Excel program launches but shows a blank screen instead of the normal content, you may try to maximize the window if the original window is not full-screen or minimize the window if the original window is full-screen.
This may refresh the Excel page and push hidden data showing up. The function of the DDE is to send a message to Excel once you double-click a file. Thus, Excel instructs to open the file. Step 2. Step 3. Step 1. Open Windows Control Panel by searching it in Taskbar. Step 4. Then, it will open the Default apps screen in Windows Settings.
There, scroll down and click Set defaults by app. Step 5. On the next screen, click on Excel in the app list and click Manage under Excel.
Step 6. Or, you can simply change the default open app of the target file by right-clicking on it and select Open with. While working with Excel, you may see the message: Excel cannot open the file because the file format or file extension is not valid. This may occur for the following reasons:. If you still get an error message that Excel cannot open the file because the file format or file extension is not valid, there are some great methods to fix it!
In all versions of Excel until , documents were saved in the XLS format. Therefore, all you need is to modify the file format and it will become available.
Open Excel and, on the taskbar, select File. Try to restore Excel from the previous version. A list of previous versions will appear; you need to select the option you are interested in and click Restore.
To do this, go to the application and on the Taskbar click on File, then select the Information with the left mouse button. A list of files that have been automatically saved will appear. Right click on the file you need and select restore.
This is a built-in easy-to-handle MS Excel utility that allows you to correct the error excel cannot open the file because the file format or file extension is not valid. Enter the Excel application and on the Taskbar click File, select Open from the list, then click on your inaccessible file. Now click Open and Repair. As a result, you will no longer see the message of the workbook cannot be opened or repaired by microsoft excel because it is corrupted and you will be able to use the file again.
DiskInternals Excel Recovery is a great solution for you, as this software is designed specifically for recovering Excel files. And for DiskInternals Excel Recovery , the Excel cannot open the file because the extension is not valid in Excel this is easier than ever. This product works in all versions of Windows, can recover files from all versions of Microsoft Excel , , , , , etc.
This software has a lot of additional functions that make the work in the installation convenient and understandable. For example, the Preview function before recovery, which is also free, will help you to select the necessary files for recovery and also ensure that they will be restored correctly.
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