Excel cannot open file 'file.xlsx' because file format or extension is not valid
※ Download: Excel cannot open the file because the file format or file extension is not valid. verify that the
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Excel cannot open the file claim format. I have also have trusted publisher certificate in my system for this source.
Excel cannot open file 'file.xlsx' because file format or extension is not valid - If you have feedback for TechNet Support, contact. Open the Excel File in Safe Mode Step 1.
Possibilities It could be that your files have got too large for your hardware to open. It could be the result of a malware. RM First try to rename file. Go to tools, folder options, file types and check have you. If not then rename the file. File, open, select the corrupted file and click open and repair option. One more way is paid, but if nothing helps it will be useful Recovery Toolbox for Excel Have you tried opening it on another computer? Does this happen after a Windows update? It is not unknown for Windows updates to reset file associations not common but I have seen it happen on some computers. What version of Excel are you using? If you press Ctrl Shift I, do you get an error message number and, if so, what? Is there any VBA in the file which is used to save the file? Or a file with a macro Following on from one of Paul Wakefield's points, if the file contains VBA code and was originally saved with a. XLSM extension, renaming to to. XLSX in the file system could cause this issue intentionally, as Excel seeks to ensure that all files containing VBA code are seen as distinct from those that don't due to the malware implications Also, if you exit Excel and try and re-open the same file does it still happen? Sometimes Excel runs out of resources the more files you have open and this can cause strange error messages until you exit and re-open.
If you feel any content is violating any terms please. Send me notifications when members answer or reply to this question. Press Windows+R key, type: excel. If it happens completely randomly, does it happen more often to the same group of people. Further, restores entire data items like table, chart, chart sheet, image, cell comment, formula, sort, filter, and more. Sometimes Excel runs out of resources the more files you have open and this can cause strange error messages until you exit and re-open. Before you open the file, try copying it and changing the extension to either an older version. I am using MS Office 2007 on my pc and I have several excel files which I always use at work. I have no strange characters in the filename nor in the name of my HD. I've copied the file and tried to open it at home, and get the same error message.
