Word and Excel does not give me option to "send a document as an attachment".
Under 'Tools' - Options etc. "mail as attachment" is selected. I didn't
have a probelm with it before. Recently, Norton AntiVirus and McAfee
Security Center were installed, could this be the reason why I am having a
problem?

Subject: can't email documents as attachments

Hi,
do you have this problem only for attachments, or the problem is more expansive (you can't send e-mails messages)?

Sometime, after Virus update, you can't send e-mails. Norton Antivirus have a note in Symantec web site