In windows 7, there is no way to change a fle type in explorer... I want to change a PNG into an ICO. in XP there was a way to change it in rename, but you would always have to type the file extension when renaming.

Open the Control Panel from the Start menu. Open Folder Options in the Control Panel. Note: If Folder Options is not available, change View by to Large icons at the top right of the Control Panel. Select the View tab in the Folder Options window. Uncheck Hide extensions for known file types. Click OK to save the changes. Resource for this tutorial was: http://maximumpcguides.com/windows-7/change-a-files-extension/You can now change the file extention when you rename the file.Kind RegardsFilip wilms

Notice that just renaming a file from png to ico doesn't make it into an ico file.