Personally I would not buy an Advent.
These tend to be "badged" laptops made by a whole load of different no-name companies so they are not a proper brand as such (like say Toshiba or HP).
They used to be sold only through PC World / Currys, although I believe they are now sold in other places as well.
The same companies who make laptops for Advent also make some of these no-name brands sold by supermarkets.
I am not saying all Advents are bad (some people have had very reliable Advents) but others have had very poor Advents.
I would suggest going for a brand who make their own computers and have a world wide reputation and image to keep up.
Names like Toshiba, HP, Dell, Sony, Lenovo, Acer and so on.