To resolve this problem please follow these steps. Install WinTasks using a newly created user with administrative privelidges. This is possible by going to the 'Start Menu' and going to 'Control Panel'. In this Control Panel window, goto 'User Accounts', and create a new user with administrator privelidges. Having created this user, please log off your current user, log on as this newly created one. Proceed to install WinTasks, ensuring you enter your details currently when prompted. This should now be successful and without error.