Forum Discussion
New excel file cannot open because the file format or file extension is not valid
Hi. When I right-click on my desktop and create a new Excel file and try to open it, it gives the error "Excel cannot open the file 'New Microsoft Excel Worksheet.xlsx' because the file format or fil...
Same issue here with one of my colleagues. Files created from the desktop are auto-corrupt with 0 KB and the error that Excel cannot open the file because the file format or file extension is not valid.
Excel is set as default app for all Excel associated file types.
Excel works fine from Start Menu and creating files once Excel is open works fine as well.
Excel is set as default app for all Excel associated file types.
Excel works fine from Start Menu and creating files once Excel is open works fine as well.
- This is not a Windows 11 issue, at least for me. This has been an issue for me on a Dell desktop machine for as long as I can remember (I purchased it 6 years ago), and repairing Office 365 has not helped. I suspect that the template for a new Excel file created via File Explorer is either missing or 0-length, but I have been unable to it. Any suggestions on where to look?
