Do get rid of McAfee as soon as possible, before it does more
damage to your Windows Mail. Windows Mail is not compatible
with most McAfee or Norton security programs. Those will need
to be uninstalled, not just disabled.
After uninstalling your non-compatible antivirus, download
and install a more compatible antivirus like the free Avast:
http://www.avast.com/eng/avast_4_home.html
Even compatible antivirus programs will need to have their
email scanning option turned off. For more on this topic see
http://www.oehelp.com/OETips.aspx#3
Gary VanderMolen