@ MrDJ
Isn't Hotmail meant to be doing the anti spam function like Gmail ?
So how do you download them if as you say "they just show up in my in box but i never open them. both have the green avast safe tag" I assume you download then otherwise Avast wouldn't really scan them.
Whist they may well spam, but that doesn't mean malicious (what the Email Guardian would be checking for),
Whom they are from is irrelevant to any scan being done on the emails. What avast is scanning for is security based issues, not spam. Should you click any link in those emails, the Web Shield 'should' come into play to prevent you visiting a malicious site.
As Pondus said you can also use spam controls in msn/webmail.