Ok, so you have been hearing about Microsoft's answer to all the Spyware, worms, and viruses appearing on Windows XP systems forever. Windows XP Service Pack 2 is near completion, and is scheduled to be rolled out at the end of July (barring any further delays!). If you would rather try it out now, you can download and install the latest Release Candidate of Windows XP SP2 right now.
Remember, this is just a Release Candidate, not the final version. Install at your own risk.