Even if your OS is out of date: 1 - Malware should be purged on shut down 2 - Only specific sites are accessed, e.g. banking domains, minimizing the risk of p

Even if your OS is out of date: 1 - Malware should be purged on shut down 2 - Only specific sites are accessed, e.g. banking domains, minimizing the risk of picking something up through e-mail or careless browsing. 3 - Obviously you shouldn't be running a server. 4 - You should still practice safe browsing, being aware of packet injection via public WiFi. If you are being specifically targeted, that is another issue.