Microsoft has updated Windows to stop trusting untrusted desktop.ini files, a change aimed at addressing a long-standing security vulnerability that has existed since 2003. This decision affects the display of custom folder icons, as Windows will now ignore customization metadata from potentially unsafe sources. Users can still use custom folder icons if the desktop.ini file and icon resources come from trusted locations. A workaround allows users to manually create a desktop.ini file with the desired icon while following new security protocols.