Hi Jalyn
>1. You mentioned that the problem was seen with Office 2013 originally, so you could try to copy >the Excel content to a new created Excel file, then delete the old one and re-embed the new one >to the Word document to see
the result.
>2. Make sure the Excel file type and Word type be the same. Such as: .xls and .doc, or .xlsx and >.docx.
I didn't create the file. I asked my colleague to open the excel and save it locally. That file extension was xlsx. The doc is docx.
>3. You also mentioned that others could open the embedded file successfully, so the reason may >on your Office application or your PC. So you can try the two methods below:
> a. You can try Office safe mode to determine
if the third party add-ins affect the office program.
I did but didn't help. The same behavior.
> b. You can perform a clean boot in Windows to determine whether a background program is
>interfering with Office program.
I did reset the PC (warm start, cold start) but didn't help. And like i said, i uninstalled office 2013 and then install Offic365 cleanly.
>If the problem persists, could you please provide some information for me?
>1. Your Office 365 version(open Word >File>Account>About Word)

>2. What is the detailed step you embed the Excel file?
Like i said, I didn't create one.
However, I just created a different file docx. Then I insert the object xlsx by the following procedure.
Open the docx file > insert > object > 'Create from File' tab > browse and select xlsx file. > Check box "Display as icon" > click ok to close > save the word file.
At this point, if double click this excel icon object, then the excel file was opened successfully.
However, then close the docx file and the reopen . Then double click the excel icon. The problem again still exists. Right click on the icon shows "Unknown Object". >3. What is the expression of this Excel file? link? Or icon?
Icon.
Also I tried the following but didn't help.
Go to "Programs and Features" > click on Microsoft Office 365 ProPlus > click "Change" > select quick repair.
After the repair was completed, then i tried to open but the same issue.
Instead of "quick repair"
Go to "Programs and Features" > click on Microsoft Office 365 ProPlus > click "Change" > select "Online repair".
After 3 min or so, it suddenly failed to repair. And Microsoft Office 365 programs were removed completely. I check the Microsoft Office folder but empty.
After that I was able to reinstall from Start menu > Office > install office
Now the last option is to reinstall the Windows10 ?
Thanks
Sam