If you drive a BMW M Roadster (2001), an Acura Integra (1998) or a Mercury Marauder (2004), don't leave your doors unlocked. When it comes to most often stolen cars, these three top the most recent list from CCC Information Services.
If you've left the doors unlocked (in terms of security) on your PC, you've probably already noticed your car isn't the only thing you've got to worry about.
For hackers and spammers, the ones with their doors unlocked are the ones who are easy marks. In the three main areas of spam, viruses and spyware, there are some quick ways to protect yourself with a triple alliance of no-cost solutions. For solidly-rated defenses on these three personal security fronts, try these free downloads from Alwil, Spybot, and Trend Micro (links are to the company sites).