Help with Wh.dll hack on Win7

Hi, i have searched this forum inside and out looking for a solution to this problem and came up with nothing. I am running Windows7 HP Edition, with Avast 4.8 AV and Comodo Firewall. I have downloaded a ton of WH.dll files with injectors, but whenever I try to move the WH.dll file into either the Crossfire directory or just to inject is straight, i get a box pop up saying that
'You dont permission to open this file'.
To start, I am the only user, who the feck this administrator person is im supposed to ask for permission off is a mystery. I have granted full permission in the 'Properties/Security' part by right clicking the file; I have granted full permission to the whole of the C: drive infact the same way. I have disabled my AV, un-installed it even, but nothing. Someone said that it might be Win7 itself, but i see a good few people who have a wall hack running under 7. Is there anyone who can steer me straight, all help would be hugely appreciated. Apologies to those who have read similar threads, but i really need this communities help.
Thanks!!!!