I can see nice transparency (with border and body) when I open "Add gadgets windows". Why not all other window like "my computer"? is it possible to add bluer transparent to 'my computer' like gadgets window?
The only real way to have transparent windows is to download or install programs that have transparent windows by default. One of these is the Firefox 3.7 Alpha 4 Preview available for Windows. You can enable Aero Gass in this, so it is transparent. You can download it here. Other than that, it is up to an individual program to have transparency enabled. There may be some people online that have a transparent copy of Windows Explorer, so just ask for that more specifically.