Jeanie said:
When I try to delete some emails. I get A unknown error has occured
Download and install this hotfix, with Windows Mail not running:
http://support.microsoft.com/default.aspx/kb/941090
Although it's labelled as for mail stuck in the Outbox, it also works in
other folders. If the don't know whether you have a 32-bit version
of Vista or a 64-bit version, try the hotfix for the 32-bit version first.
Certain common antivirus programs, such as most of those from
Norton or McAfee, tend to cause this and other problems in Windows
Mail, although seldom immediately, so if you have such a program,
remember where to find the hotfix, and hope it will install again if you
need it again. A recent version of the Trend antivirus program also
causes assorted problems in Windows Mail..