Keep your software and web plugins updated
Always update your operating system on a regular basis or automatically if possible. Keeping your system patched is a good way to lessen the number of vulnerabilities that an attacker can exploit. Web plugins should also be kept updated. Many attacks can happen in a web browser, it is very important that you update plugins such as Adobe Flash or Java. Use the auto update feature if possible, or go to the vendors website to download and install the latest patch.