other tips

1. dont Install Third party applications Unless Fully sure. Live without some cool features but don't download widgets or tools . you are not sure of and doesn't come from the parent site itself.
2. Beware of user-generated spam. Social networks like Facebook rely on users to enrich the experience by posting content such as pictures and video (as well as links) and then sharing the content with their contacts. Spam-based social networkers will go to other people's comment threads, for instance, and chime in with links that, if clicked on, will install malware. So beware of that too.
3. Keep Yourself Updated with Latest Security Software. A real time anti-virus scanner is very important to have if you are using internet, along with a good anti-spyware and firewall software. They can be your friends in more ways than you can think of. And yes, juice them well with regular updates. Read these articles if you are in search of good free Windows software.