First thing is to remove McAfee or Norton AV and antispam from the computer
if they exist. You may need to visit their website to fully uninstall the
product. Then get something less invasive. There are a number of free
antivirus programs, but with any you have to disable email scanning. See
www.oehelp.com/OETips.aspx#3
You can also try compacting and repairing the database using my WMUtil
program (
www.oehelp.com/WMUtil/).
After that, the only solution so far is to wipe out the database. So go to
Tools | Options | Advanced | Maintenance | Store Folder to find the message
store location. Then move everything under that Windows Mail directory to
another directory. Then restart WinMail and it will open fresh with nothing
in the database. You can then add your accounts and if they work correctly
then you can use File | Import | Messages and choose WinMail format and
point to the directory to which you moved the files.
steve