Bluescreen generally is a hardware based problem. Some people suffer no side-FX from SP2. That's true. But many people update their win systems rather blindly. A win user of many years should be aware that MS updates often do have bugs & it's best to wait a while until it's been fully tested i the market place & any possible follow up patches released. Blindly updating is a little like being a beta tester b/c obviously MS don't fully test their releases. Not to forget the many variations in people's system. For that reason for p2p use, for the average home user, it can be safer not to install SP2 so that there's no sudden unwelcome surprises & much frustration to try to find the cause & solution. To reiterate: Different systems behave differently.