I always do this .. I have found
this as a very secure way than editing
registry keys ..
Click Start, Click Run, Type GPEDIT.MSC
, Press Enter
select User config (click on "+") select Administrative Templates, click on Desktop
In the window @ right side .. Find Remove Recycle Bin Icon from Desktop
Double click on it, you can see a new window now ..
Select Enable option, Press OK.
Go to your desktop .. refresh it .. Recycle bin disappears ..
very important:
to retain your Recycle bin .. select Not configured instead of Enable in above steps ..
hope it helped ..