43b7af74_vices_List___Overclockers_Club__Notes
[Service Name] Network DDE [Recommended Setting] Disable [Notes] 
Microsoft says: "Network DDE is used to initiate and maintain the network connections needed for DDE conversations between applications running on different computers in a network. A DDE conversation is the interaction between client and server applications. You use network DDE along with DDE and the DDE management library (DDEML) in your application." You can disable this.
Windows XP Services Removal Guide » Page 2 - Windows Services List - Overclockers Club
Notes