Based on the writers own experience, it also offers two reliable solutions that work for the writer.
Since then, more and more users haveupgraded from the previous Windows 10 to the newest Win11.
That happens right after Iclean installed Windows 11with its official installation ISO image.

If I give a shot to shut the Word, again, the pop will show itself…
It is just a cycle!
If I chooseDont Save, both the popup and the Word document will disappear.
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Of course, the Cancel option does not help either.
It can only terminate the popup without saving any changes.
Why wont Excel open?

How to deal with Microsoft Office Excel wont open problem in Windows 10/11 operating systems?
Here are 11 methods for you to choose.
# Excel Cannot Save Changes
The satiation for the Excel file is similar.

Try saving to a different file.
If I directly use Ctrl + S shortcut after editing, the above error will directly appear.
How to Fix Cant Save Changes to Old Office Files Issue?
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Then, cant I save the changes to the old documents?
Why and how to solve the problem?
The below solutions are both figured out by myself and workable after my test.

shut the existing document, then fire up the temporary document and save it under a new name.
What is the get genuine Office message?
How to remove the get genuine Office warning?

Why does the get genuine Office banner show and its potential damages?
Or,your changes could not be saved due to an invalid configuration of the account.
So, I changed the permission of it and the error was fixed.

Right-choose the target Office file and selectProperties.
In the Properties window, switch to theSecuritytab.
In the Security tab, clickEdit.

Next, selectUsers (computername\Users)and assign its permission toFull control.
ClickApply > OK.
Or, you’re free to do the following steps.
ClickEditin the above Security tab.

Then, click theAdvancedbutton in the Select Users or Groups window.
Click theFind NowIn the search results list, find your account, and clickOK.
Then, back to the Select Users or Groups tab, your account will appear.

Return to the permissions change window.
There, select your account and set its permission toFull control.
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