Go to start menue then
Click: run
In run type gpedit.msc, A new window will appear then 
Click on user configuration then
Click on desktop then 
Click on remove recycle bin from desktop (double click) then
change it not configured to enable then
Click on apply and ok.

now come to start->run->gpupdate.exe and press enter.
 
your recycle bin icon is gone from desktop and you will need to revert your settings for get that back.
after reverting setting make sure to run gpupdate.exe command.