IE7 Error Message

Just started getting an IE7 message, "The address is not valid" whenever I
try to access an email attachment (via Earthlink). Recently updated
SpyBlaster and that seems to have started the problem. Even older emails that
I saved, complete with attachments I could access last week, are no longer
accessable. I have an AOL link through Earthlink and if a sender sends the
email to me again at AOL, I can get the attachment. Somehow, some IE7
settings have been changed and being a novice, I'm clueless as how to go
about fixing it. Even disabling SpyBlasted did not work. Earthlink tells me
it is not their software.

Thanks for any assistance.