Protect yourself from Phishers
Some people are fans of Internet browser toolbars. Here's one that I think is handy, which I would recommend to most computer users. Netcraft offers a free toolbar to protect you from phishing attacks.
Remove Common Viruses
Also, Microsoft has release a new Malicious Software Removal Tool for Windows 2000 & XP users. You can run this online, and I would recommend you do this on the 15th of each month, as the tool is updated on the second Tuesday of each month. For those of you interested in an alternative, also try McAfree Stinger or the avast! Virus Cleaner.