well if you mean you cannot save files that u get in email that are in outlook express try checking this first.....
open outlook express then goto tools,options,security and make sure that the "do not allow attachments to be saved or opened that could potentially be a virus" is NOT checked.
other than this... i dont really know of anythign else off the top of my head that could be causeing this.
p.s. if you uninstall SP1 does this problem still happen?
good luck
