The workaround on the Hp site for Amd computers with the intel xp installation disk images works just fine. I had the constant re-boot problem after installing sp3, but after renaming the intelppm.sys driver, as described, my computer works just fine with SP3. Only took 5minutes to do in safe mode!

We have thousands of dx5150 and dc5750 HP PCs. If you're not using HP's factory image, no problem.

One should never install beta programs using "retail" pcs. All new software is always a beta. Thank god my AMD HP pcs are still running.

I updated one of my PC (a Compaq). But it was easy to reboot to safe mode and uninstall SP3. It was back to its old self

This is insane. The same thing occured in Vista's SP1. Looks like AMD users that own a n HP need to hold tight and hope for the best. Another Hotfix coming your way. =)