I got this problem. Maybe some people just ignore about it but for me [ perfectionist maybe ] very particular about this thing.. so i worked it out until I got back my transparent desktop icons. Alhamdulillah.

Because, I copied picture from word document to the desktop ! Huh.. so stupid,rite ???

There is a few ways, but I've tried and this is the one can solve my problems..hehe

1. Right click at the desktop to to get 'display properties'

2. Under desktop tab, click 'customize desktop'

3. Then, choose web tab. If you have any web pages or html or documents that are checked in the web pages window, then the transperancy effects will not work. In other words, enabling active desktop disables the transperancy. Done !!!