no system properties ? whoa every version of xp ive seen has system in the control panel , how have you ever got this far without getting into device manager ,,,theres a shortcut to system properties by pressing the windows logo key and pause/break key both at the same time
Are you the administrator or a user account ?
Maybe you will have to try manual instal in safe mode
in safe mode you will be running as administrator ,,,on reboot hit the f8 key that gives you the options to boot in safe mode
also you may find that in control panel you can switch to classic view worth a try to see if the system icon appears