Check for updates won't work for administrator user

I got the “Only Administrators and users with Administrator privileges can check for updates”, but this user got administrator rights (i checked the user rights, no mistake) on this computer.

XP SP2 Hungarian, let me know if you need another detail.

Sorry if this is a silly question, but did you reboot after granting that account admin rights?

This user always had administrator rights BUT i didn’t reboot! Thanks for this Japo, solved :).