How to lock the Desktop icon??

step 1: click start button
step 2: click run
type gpedit.msc
a box will open and now double click the last option (ie.,)administrative templates
You can do everything like locking any files or any thing ypu want in any field. The changes you made from here cant be changed by other people who doesnt know that command!!

Note:
Take system backup before using this command.It is purely for educational purpose only.Try at your own risk