Notes about the QAT 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 QAT file type is primarily associated with 'Office' by Microsoft Corporation.
The Quick Access Toolbar is a customizable toolbar that contains a set of commands that are independent of the tab that is currently displayed.
You can move the Quick Access Toolbar from one of the two possible locations, and you can add buttons that represent commands to the Quick Access Toolbar.
Detailed information for file extension QAT:
Hex: 3C 6D 73 6F 3A 63 75 73 74 6F 6D 55 49 20 78 6D 6C 6E 73 3A 6D 73 6F , ASCII: mso:customUI xmlns:mso
'Identifying characters' used on FILExt.com are
provided by Marco Pontello from his TrID database
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.