Hi @松澤大介
Currently in Microsoft Q&A we only support English, could you please edit your question into English?Then we can understand your issues better, thanks for your understanding.
Via translation tool, I get following image.
It seems that the "message" is not uploaded successfully on your post. Please try to share us again. Are you unable to open all Excel files, or specific Excel files?
- If specific Excel workbooks can not be opened, please check their file extension, such as .xls, .xlsm or others.
- If all Excel workbooks can not be opened, I suggest you open them from Excel desktop client instead of double-click directly.
Besides, it's recommended to try following steps to have a check.
- Change the file location to have a check. Such as move files to Desktop.
- Run Excel in safe mode via
pressing Win +R > Enter 'excel /safe' in Run dialog > Try to open one Excel workbook to have a check
. This action can help us troubleshoot the COM add-ins, startup items and macros. - Perform Online Repair for Office from Control Panel.
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