As I recollect Maria did say that this was for during the lunch hour. If her employer permits recreational use of the systems (usually external access to the internet, say) during lunch time, it is not up to us to give the appearance of contradicting that.

Loading of non-company software is, as has been said, pretty unlikely to be allowed, which will exclude some of the suggested ideas.

What I would suggest is that, if lunchtime access to sites like Ancestry is permitted, then printing off a To-Do list (printing? Oh dear, listen to me!) sounds like a good idea and Maria could do some research on Ancestry (or whatever) during that time, copying and pasting results perhaps into a mail to be sent to her home address. It makes some use of time if you feel like it and it's pouring down outside.

Adrian