I bought a SpySweeper subscription about 3 years ago, and at first I thought it was the cat's meow -- thorough sweeping and good proactive defenses, etc., regular updates, and most importantly, my system never got a baddy -- I have always used a good AV, too, so those two reasons worked, it seemed. Then I noticed about 18 mos ago it was running very heavy. So I took it out, even though I had just bought an extension until 2009. I know it is now up to version 5.5, AND I and I'm wondering if it has lightened up a bit, or does it still lock into almost every conceivable part of the OS?? Anybody has experience with the latest SpySweeper??