Hi N/N funny you should say that but the guy who has been to this one said whatever you do don't get Windows 8 get 7 and avoid what you have now Vista 
Now that Windows 8 has been upgraded to Windows 8.1, it's brilliant, whether you have a touch screen or not.
The trouble with 8 was the input if you didn't have a touch screen, but the start button and boot to desktop have returned in 8.1 and I love it.
