How can I stop a "DDE Server Window" error message from coming up every time I turn off my computer? I suspect there is something in the regestry that needs to be changed or deleted. If that is so, what and where is it located?

dear doneb,
"DDE" means Dynamic Data Exchange. It is used in windows2.0 and also used in some places higher versions of windows. So it is not a spyware or malware.You can disable it by followin the steps below.
>Click Start, click Control Panel, click Performance and Maintenance, and then click
>Administrative Tools.
>Double-click Computer Management, double-click Services and Applications, and then
>double-click Services.
>In the Details pane, click Network DDE.
>On the Action menu, click Properties.
>On the General tab, in Startup type, select disable, and then click OK.