Idea desktops/laptops for my Nan?

Hi, i was looking for a new computer for my Nan as her old computer is over 9 years old.
What would you suggest? She will only really use it for word and the internet.
Is she better of with a laptop?
I was looking at this

http://www.johnlewis.com/store/lenovo-h500s-desktop-pc-intel-pentium-4gb-ram-500gb-metallic-black/p1357490?navAction=jump&_requestid=11196193

or

http://www.argos.co.uk/webapp/wcs/stores/servlet/Browse?storeId=10151&langId=110&catalogId=10001&mRR=true&c_1=1%7Ccategory_root%7CTechnology%7C33006169&c_2=2%7C33006169%7CLaptops+and+PCs%7C33007795&c_3=3%7Ccat_33007795%7CLaptops+and+netbooks%7C33014243&r_001=7%7CProcessor+type%7CIntel+Pentium%7C1&r_002=5%7CPrice%7C200.0+%3C%3D+%3C%3D+299.99%7C2#pdpFullProductInformation

she's looking to spend £300 on it.

I think Desktops better then laptop.