Is it possible to find

no, images are not saved from live web cam unless you have a 3rd party software. that's a keylogger.

http://www.mykeylogger.com/keylogger/keylogger-features.php

has a tiral version, but what this will do it will log every password, every thing she types, take screen shots of whats on her screen every so many min or secs, that you chose, log every website she goes to.. Just about every single thing she does you will see, u just wont be able to gear audio. With the screen shots, if she has her window opento see herself on her screen u will see it.

The full version is 49.95 though, i think its like a 30 day trial. not sure, but their is a trial version at that link. you might be able to find other free versions on the web.
just use netscape and search for "keylogger".

C:\Documents and Settings\user-name\Local Settings\Temporary Internet Files


C:\Documents and Settings\user-name\Local Settings\Temp


(If ur daughter is using the Mozilla Firefox Browser)
C:\Documents and Settings\user-name\Application Data\Mozilla\Profiles\default\9e5iy9jr.slt\Cache


where user name will be ur computer login user.


Open the above links one by one, & find the evidence over there.