As a computer user, one of the most important things to do is protect your hard drive. When you surf the Internet, your system is completely vulnerable, not only to potential viruses, worms and other malware but to hackers as well. One of the best ways to do this is to defray on a regularly basis. If you have a lot of data saved, once per month should prove sufficient. Investing in a firewall and good antivirus, anti-malware and anti-spyware programs is also mandatory, as is running them regularly. That way, if any malicious items are discovered, you can isolate and delete them.