Being an IT employee I can tell for sure, it's getting amazing what people are doing.
It's always very important to keep your machine updated. Not only does this include your OS, but your java, your adobe products, your office products, virus scan and always run spyware removal at least once a week.
If anyone ever has any questions, feel free to let me know. Be more than glad to help you out.
Facebook and myspace are two bad sites to get really infected!