Hi, I just googled for Vista MSN issues. Since I don't know how your daughter uses MSN, here's a few sites I found, maybe one will help. One of these refers to a user that uses MSN dial up client to get to the internet.
Anyway, here's some:
http://kurtsh.spaces.live.com/blog/c...38D!1953.entry
http://www.techsupportforum.com/micr...p-radomly.html
http://www.microsoft.com/communities...&cr=&sloc=&p=1
If none of those sites help her, please provide some more details/information so I or someone else can help further. If you google "Vista freezes", you will be overwhelmed with sites to read.
Diane