PC-cillin is the brand name for a Trend antivirus program. A recent
version of that program is one of the three antivirus programs that
cause the most problems in Windows Mail (Norton and McAfee
are the other two). Just disabling part of all of it seldom helps;
you usually have to uninstall it instead. You then sometimes need to
remove your email account under Windows Mail, then restart
Windows Mail and add the account again.
Let us know if you've ever had a Norton or McAfee antivirus
program on that computer, even if it was one of the free trial
versions that often come already installed on new computers.
Their uninstall programs often fail to remove the parts of those
programs that cause problems in Windows Mail.
Check your list of installed programs for any of these programs:
Google Toolbar, Google Desktop, and SMS Desktop. If you
find any of them, uninstall them, since they also cause problems in
Windows Mail. Web sites that let you do a Google search are not a
problem.
If the above cures your problems, you may want a replacement
antivirus progran that doesn't cause problems in Windows Mail.
I recommend either avast! or AVG, either one with a custom
install where you tell it to leave out the parts that scan email.
http://www.avast.com/eng/avast_4_home.html
http://free.avg.com/ww.download?prd=afe
http://thundercloud.net/infoave/tutorials/email-scanning/index.htm
Also, some email servers require you to enter your username with no
spaces and no CAPITAL LETTERS. Some require that you follow
it with the part of your email address that starts with @, and some
require that you don't. Many require that you be careful about which
letters of your password are CAPITAL LETTERS and which are
lowercase. Many give rather vague error messages if they find anything
at all wrong with your username and/or password, in order to avoid
helping anyone trying to guess your username and password without
your permission.