Excel doesn't recognize the document

[Stoutall]

Microsoft Excel doesn't recognize .xlsx document. This happens on both my computers.
Any suggestions as to what causes this?

Office 2016
Thanks

 

[sh3p]

Get good, that's all I can say.

 

What's an XLSX File and How Do You Open One?

 

Microsoft Excel doesn't recognize .xlsx document. This happens on both my computers.
Any suggestions as to what causes this?

Office 2016
Thanks

You can either use roary's link and try those methods, or what i normally do is upload the doc onto Google Drive and redownload it to the proper extension.

 

[oscles]

Try the following in options:
1.Disabling Auto Recover and Autosave.
2. Unchecking the "open email attachments in reading view".
3.Disabling Protected View.
4.Adding the network folder location to Trusted Locations.
Also you can refer the this link: Excel Repair Toolbox