Question about Outlook Express

Can someone help me to STOP the annoying pop up from Outlook Express to free disc space?!!!I have Windows XP and a Hotmail acct which is now an OUTLOOK acct,I do not have OE nor do I want it!Everytime I start my computer this annoying pop up appears and I am a novice computer user so please keep that in mind  ,I can follow step by step instructions and have tried removing OE from Outlook Today properties to no avail.....Even if I would ever have thought about using OE I wouldn't even CONSIDER it after having this pop up in my face everyday!!!!!Please help...it's really driving me crazy!........KWIK