Notes about the MSW file extension:
To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened
" (Windows 7) or "How do you want to open this file?
" (Windows 10) if you double-click the file. There click on "More apps"
and choose a suitable software to view such files on your PC or from email attachments.
The MSW file type is primarily associated with 'Word' by Microsoft Corporation. Office Word is an authoring program that gives you the ability to create and share documents using a set of writing tools.
Detailed information for file extension MSW:
Primary association: Word
Mime type: application/msword, application/x-dos_ms_word
To change file associations press Windows Key
and then Apps and Features
> Default apps
> Choose default apps by file type
Invalid file associations could be the result of underlying issues within your Windows PC.