The easiest is to see with your HP support: I am not up to date on how your proceed now HP changed things.... I am of course talking of how to bind a support contract with a user account(and where you do create a new user today?).
Once that is done, come back here if you need more on how/what to download patches.
It is a software assistant tool which will (ran against host from HPSIM) determine the current patchset, check on HP site for never patches (this will require HP account) and make a report what is out, and what are you missing with appropriate links to download