Keep desktop icons as they are shortly after logging in The following image shows two screenshots of my Mac's desktop whilst starting up. The first is a few seconds after starting, whilst the other one is a few seconds to shutdown.

I prefer the icons on the left, from the first screenshot. I would like to keep them as default. How can I show the first set of icons as default?
This is because it loads the previews of the files, which replace the default file icons. To disable icon previews on the desktop, click on the desktop, press ⌘J and uncheck ‘Show icon previews’.