Two suggestions:
1. Windows Mail is very sensitive to interference from certain antivirus
programs. Read http://www.oehelp.com/OETips.aspx#3
If you have McAfee or Norton antivirus, uninstall it. Reboot and try
Windows Mail again. Once you get your email working properly,
download and install a less troublesome antivirus program such as the
free Avast. Whichever antivirus program you keep, be sure to
disable its email scanning option.
2. If that did not fix the problem, copy the error message and paste
into a reply here.
