Neither TICK or Sound Control support the new user switching functionality of Windows XP or above. If you wish to switch users you must fully restart Windows. This will avoid issues including the incorrect sound device being selected and unable to access data files the applications need to run successfully. You may find you need to install TICK or Sound Control in each users environment. In most cases you should be able to select the same installation folder but as before installing any application it is recommended you backup your data files. For example, your TICK Log folder which is normally found in c:\program files\tick. It is also important if you are experiencing issues to ensure all users have Administration level privileges.