GIMP: Script fu process doesn't end

I use GIMP portable at school to do some icon and logo design and whenever I use one of the features in the script fu pack on an image, after i close GIMP, the script-fu.exe process stays running. The PCs are running XP Pro on a limited account. This issue only occurs on the school computers, it hasn't happened at home at all, and only if I use one of the script fu features.