I doubt that is a issue in the software, probably a mistake on part of the user. Here are some solutions for your problems you mentioned: --if you can't delete the "WinToolkit" folder and you are absolutly sure you want to delete it, you can download a LiveCD of Ubuntu (linux), boot trou it and delete the folder your having trouble to delete. --regarding your windows, if somehow you messed up, you can simply go to restore option on windows and use a restore point date from before you start noticeing the problem you got. Hope it helps you, these are the simpliest ways you could resolve your problems.