So you have got simply bought a replacement pc for your home (rather than for a geographical point or as a server) and need to secure it (including protective it from viruses and spyware). Privacy (including cryptography, cryptography and anonymity) may be a a part of security however broad enough to want covering singly. consider Privacy because the flipside of the coin. creating backups of information, defragging, system restore points ar solely indirectly connected. Backups will really create your information easier to steal and retrieve.
This article assumes you would like to use a network (such because the internet), share files on thumb drives which your laptop may well be physically accessible to others. If none of these apply, then your several of those steps could also be redundant as your laptop can already be quite secure.