I know of one so far: If you use an ALLTEL broadband wireless card model Kyocera #KPC680 Do not install sp3. Your pc will just blue screen you to death. even in safe mode. * Unplug card, boot pc, uninstall service pack 3 in add/remove programs. Your Done. Back to sp2. Check show updates to see the service pack to uninstall. I had to fix my buddy's Dell Laptop a few weeks ago. and sp3 was the problem. well, or rather probably the driver for the wireless card didn't like sp3. So if you get a blue screen after sp3, start unplugging stuff... l-o-lHas anyone had any trouble with Xp service pack 3? It comes up as an update, but have not installed yet , waiting to see if any bugs are found first. Thanks.
Well there is a work around for those who have the AMD processor and want to load SP3. You install SP3 but before you reboot your machine there is a driver file that you need to rename. That way you will not get the reboots some folks have gotten.I have a HP with AMD processor...no idea if AMD made it but I'm not taking any chances.
I don't really see what SP3 has to offer as it's clearly nowhere near what SP2 was. I'll hold off for now.