I have held off on downloading the new Microsoft Service Pack, cuz I think they'll probably be bugs or some unknown issues that will need to be addressed. Is it worth updating with this service pack? I understand that it is primarily for security, and I have Zonealarm, a Hardware Firewall, and Norton Systemworks and a builtin popup blocker with Google toolbar. I know that it will changer a lot of settings and I will have to reconfigure a my computer. Are there any issues that have been identified?