Laboo's Log in Resolved Logs Posted March 1, 2006 There were two main reasons why SP2 wouldn't install on certain machines when it first came out: malware, and buggy BIOS code. You should check for a BIOS upgrade from your computer or motherboard manufacturer as many systems that would not boot after SP2 was installed will suddenly boot fine once a BIOS flash has been performed. I know it for a fact, because I've had machines not boot after installing SP2, and a simple BIOS flash made them boot again. I've fixed tens of thousands of computers in my life, and I have installed SP2 on every machine that's ever come across my bench. None have left my shop without SP2, and none of them had any issues installing SP2 after a BIOS upgrade was performed.