Simple concept:SharePoint document is locked for editing by "another user"

[Question]:
I am trying to edit the document from SharePoint library , getting an error:
The document is locked for editing by "another user".
How I can resolve this issue?

[Answer]:
Annoying...
Need some knowledge on that - The document is locked for editing by another user" error message when you try to open a document in Word
Need an immediate help? -
1. Kill the process WINDWORD.exe
2. Check out the file to the draft folder from SharePoint library

 Edit the document and safe it with checking in.
Next time you will not have problem with editing the document