Windos XP pro: Remove W32.Ronoper.Worm

Hi Everyone,

I need a big help here!
I got a virus W32.Ronoper.Worm and I followed all the instructions on how to remove from Symetric website but I still have no access to admin right. Its blocking me. For example: I can’t right click on a wallpaer and go to
property in order to change screensaver or other
configurations. It tells me that my admin right are denied. Also someone told me to remove (delete) system toolkit from Regedit. Is this the right solution or I should never touch that file?
Please Help!

Kind Regards,
Fimos