Firstly, there are two types of message history that can be saved.
The first one is message history that is saved by Messenger itself (Windows Messenger / MSN Messenger / Windows Live Messenger)..
They are saved in this folder..
quote:
C:\Documents and Settings\<Name Here>\My Documents\My Received Files\<Name Here>\History
For example, mine are saved in here..
quote:
C:\Documents and Settings\Chris\My Documents\My Received Files\chris4158979229\History
So go to My Received Files (on the account she was using), then the folder inside there, then the History folder.
The message history is stored there. Check to see if it is in there.
If the message history isn't there, maybe the folder that the history is saved in was changed? You can check where it is saved by logging onto your daughers Messenger account, go to Tools > Options > Messages. I've circled in the image below where to look (click to enlarge):
If you have Messenger Plus! installed, chat logs are saved in:
quote:
C:\Documents and Settings\<Name Here>\My Documents\My Chat Logs