Yahoo Messenger Monitor Sniffer 3.2 is an interesting tool for control, security and surveillance because it captures and saves all conversations that are maintained by Yahoo Messenger on a computer or through a certain local network (LAN), even allows real-time display of the conversation that is going on.
Conversations are saved in HTML format and can even be sent automatically by email.
If you find this program useful you can also take a look at MSN Chat Monitor & Sniffer 3.8 (see by clicking here) that does the same but with MSN Messenger.
You can free download Yahoo Messenger Monitor Sniffer 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.