disappearing icons, no internet, cannot install

Bought used computer for my daughter and
reinstalled windows xp. After my daughter tried to add additional software, the icons disappear after boot up and can only run task manager. Tried following malware read me first and cannot do all of the steps - superantispyware could not run "system admin has set policies to prevent this installation", SYpbot - could not download updates, cannot access internet, ran as many of the tools as I could and have the logs attached. Machine still loses icons after the boot up and still cannot access the internet.