I just installed a new HD but I ran into a little problem. When I tried to install a patch for COD I did it wrong. I uninstalled the program and re-installed it then tried to set up the patch again. The problem is when I do that its still finding remenents of the first time I tried to install the patch so its aborting the install because its saying the 1.5 patch is still there even though it should not be. How can I get rid of all rements of a pervious installed software? Last time I thought someone told me to use the windows registry key but I can't remember how to do that.