How do i fix file format or file extension is not valid in excel

40 thoughts on “How do i fix file format or file extension is not valid in excel”

• Thank you sir ji

• Not all heroes wear capes.

• nahi huaa sir plese mera data chla jayega

• picture not clear

• Didn't work for me

• 😡.
  Failed

• Useless

• still doesnt work.. the file size is 0 and i dnt know how to get it back 🙁

• Not working

• All of them does not work

• The both methods are not working…
  Anynone can help me

• 2 methods are not working for me what to do

• Not working

• damn still did not work. I am trying to open excel expert practice workbooks

• Great!!

• i dont have any antivirus prog in my laptop

• issue is as is …………………….This error might appear because an antivirus program is not allowing the file to open. This can be caused by either:
  
  The antivirus program needs to be updated due to a compability problem with this program.
  
  There is a virus in the file, but the antivirus program cannot remove or process the virus that it has found.
  
  In either case, the file you are attempting to open should be considered as infected until you have updated your antivirus software to the latest updates available from the vendor. All major antivirus software manufacturers have created updates to address known compatibility problems with Microsoft Office programs. They also usually provide a virus signature file that is available for download from the Internet and must be updated regularly to properly scan for all known forms of viruses.
  
  If you are experiencing this problem on a computer where a new version of antivirus software was recently installed, connect to the Internet and download the latest updates available from the manufacturer.
  
  If you are experiencing this problem on a computer where the latest version of the software is installed, all signature files are up to date, and the file will not open (but other files do), then the file may be infected with a virus and the antivirus program cannot remove the infection.
  
  The file could also be corrupted and cannot be properly processed by either the antivirus software or the affected Microsoft Office program. In this case, it may be necessary to attempt recovery of the file using the related recovery utilities that may be available with the program, although not all program have file recovery or repair capabilities.
  
  For more information about this issue, see the Microsoft Knowledge Base article 835404.

• not work

• Hi I have done this please tell the process of reversing it like earlier.

• Gracias me funcionó, pensé debía volver a repetir mi trabajo y gracias por los subtítulos 🫡

• not working

• y en español como seria

• Helpful

• Thanks 1 method is working

• These two methods none of them worked for me this is so annoying

• In my case there was no file but eitherway i kept getting this message.
  I even re-installed M365 completely.
  Turned out that Kutools plugin was the cause.
  Disable and restart and it was gone.
  After that Kutools could be re-enabled again.

• It's fake …MF .

• Method not working 😢

• not working for me !!

• I dont want see thise add

• helpful video,
  
  thank you.

• Svp que ce que tu écris dans le tableau n'est pas clair ?

• not working both

• None of this method worked out for me

• Worked like a charm!

• Both methods doesn't resolve issue

• None of the methods above worked for me nor did the others that I tried. I just had to restore my file to an older version of the file. And it did the job. right click on the file, go to show more options, then click on version history choose the time or the day the file was still working or could be opened, and then click Restore. Try and see if your file can be opened after that, keep in mind you will lose data that was saved after the time or date you chose. If that data is important, then don't try this.

• Thanks

• Thanks

• helpfull video, brother
  thank you.

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