Hp probook 4520 is a very useful sysrem . It is work very softaly and smoodly . Hard disk and ram is used qwsome quality. That think make qwsome system .key bord is very nice and fabulas. Colour is so peaty. And looks and modal is very nice . Web camera is work very clearly . Hp probook 4520s have smart Securty system . I am like hp probook 4520s because many quality attckt me to parchase this system .
My experince is too good with hp probook 4520s .