Microsoft provides virtually no support for Windows Mail which comes with Windows Visa. A friend was having problems permanently deleting messages from the Deleted Items folder. A pop-up box was showing up saying "an unknown error has occurred". Searching for a solution on the Internet brought the bad news that Windows Mail is not compatible with some anti-virus programs. One website said "Norton and McAfee seem to be the worst offenders" and added:
If you do have Norton or McAfee, it will be best to delete your current email account and create it again after you uninstall Norton or McAfee.
The same website, Vistax64.com, shows how to back up mail and reset Windows Mail.
Apparently this is either a rare or an intractable problem because a Google search showed very few solutions to it.
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