Minbu,
which version of Windows is your daughters pc? If its XP with Service Pack 2 then your lucky if not call Belkin Tech.
This is roughly the thing you should do if you got XP on that machine:
F5D7050 if you click this link it'll tell you how to fix it in most cases.
This is a problem I've seen and heard before and after 2 times a re-install it was fine.