SP2 Bug!!!

Okay this is confirmed to be SP2, (have uninstalled, then reinstlled):

When launching programs, XP seems to be adding some kind of variable to the executable (for instance ‘iexplore.exe /switch’ anything after the exe is a variable you send to the program.

Now whenever i run some programs – for instance Canopus DV file convertor – It responds as if I gave it a bad command-line command. But when I right click the program and go Run As..

Current User:
and untick ‘Protect my computer and data from unauthorized program activity’

Then it works perfect!

Does anyone have any idea how to disable this ‘feature’ by default?

Thanks in advance, really appreciate any help