[Dai]

If she's been given a laptop I'd recommend a clean install. She knows nothing about the history of the machine and the former user's browsing habits. In that sort of situation there is always a danger of the machine being compromised by trojans/malware or rootkit installs.
You could spend a few hours hitting it with every anti-this and that scanner known to man or do a fresh install in less than an hour.

Personally I'd never trust an unknown computer with anything important. I've seen too many client computers riddled with malware and them totally unknowing.