How to change in WinExplorer the default icon for all *.dat files?


Extraordinary Member
I want to change the default icon in Windows Explorer for all files with the extension *.dat.

How can I do this?

Related question:
Is it required to have a new icon with a certain size at hand?

Assume I have an icon file "newicon.ico" with a dimension 256x256 available and assign this somehow to the *.dat extension files. Does Windows 7 automatically resize this original icon to the smaller size?

Or do I have to supply a different size (which ?) icon because there is no auto-resizing?



Windows Forum Admin
Staff member
Premium Supporter

It is currently based off the program designed to open the application. Remember, there was a time where you could not open a file by double clicking on it (This was before file associations in Windows). You'd literally have to open the program first and navigate to the file.

This website is not affiliated, owned, or endorsed by Microsoft Corporation. It is a member of the Microsoft Partner Program.