Welcome to BC, Motishima.
If this is your first PC, by all means make sure you are protected against malware by installing a firewall, an anti-virus, and several anti-spyware applications. Make sure, also, that your computer is completely up-to-date with any Windows security patches.
An unprotected computer, when connected to the internet, is infected within an average of three days!
See this BC pinned topic:http://www.bleepingcomputer.com/forums/t/1628/simple-steps-to-keep-your-computer-secure/
Welcome to this very friendly user community!