Using WordPad

Use WordPad to edit your file.
is a word processor that comes with Microsoft Windows. It’s more basic than MS Word, but it’s possible to edit .docx and .doc files in it.

Right-click on the document you need to unprotect and select Open with ->
Choose another app.

Select
WordPad in the list of apps. Open the file.

Click File -> Save As -> Office Open XML document to save your file in
.docx format

• Skip this step if WordPad editing options are enough for you – once open in WordPad, document will be unprotected.