How to delete this folder.... ?

Hi guys...
i dwonlaoded the game -Gears of War -
It was a 7z extraction, after i downloaded it, i extracted it in c:
and now its not getting deleted..
whenever i try deleting it , it says cannot delete file,
if try to copy, it says, cannot copy file, if i try to move it, it says cannot move file,


Plsssss guys lemme know how to delete this.. its eatin up 15gigs in my C:

all suggestions are welcome..

Thanks a tonn guys...