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1 Φεβ 2024 · Rename the file extension to match the format of the file, such as .xlsx or .xls: Right-click on the Excel file then go to properties > General tab > Rename the file extension. Repair your Excel file: Repair a corrupted workbook - Microsoft Support. Change Trust Center settings:
When you open a file in Excel, you get an message that the file name extension doesn't match the actual file format. For example, the file has an .xlsx file name extension but it's really a text file and should have a .txt file name extension.
2 Μαΐ 2024 · In this comprehensive guide, we’ve outlined eight practical solutions to the common Excel error: “Excel cannot open the file because the file format or file extension is not valid.” It’s best to start by verifying your file’s integrity and format, then methodically try each solution one by one.
19 Ιουν 2021 · A common error message that usually occurs when someone tries to open an Excel file in Windows is Excel cannot open the file because the file format or extension is not valid. Make sure the file...
12 Αυγ 2023 · Open Excel and select “Options” at the bottom of the file tab. Select the Save tab and ensure the save format is set to a .xlsx extension before hitting ok. Additionally, you could try to go to the Trust Center Settings and uncheck the three boxes enabled for Protected View.
21 Οκτ 2022 · Launch MS Excel. From the sidebar, select Options. If you do not see it, select More > Options. Click Save from the panel to your left. Under the Save workbooks section, select the drop-down menu next to Save files in this format. Choose your file format from the list of options. Click OK. Change Permission Settings.
15 Ιαν 2021 · Resetting the Excel file associations will restore Excel to its default settings, undoing any damaging alterations to the program. In most cases, that can help resolve all issues and ensure the program is running smoothly once again. Here's a look at how to restore file associations if Excel won't open: In Windows 10:
