Applying the patches and service packs issues by Microsoft Operating Systems are usually seen to be solutions to improve and safeguard Windows users but apparently there are issues surrounding the type of processor that is in use. If you use an Intel based processors, chances are you will not be having much trouble installing and rebooting your system. The real problem really exists when AMD processors are being used and much of this lies in the configuration.
Apparently, to be able to adhere towards the proper specifications, some tweaks have to be done to the main processor of AMD based units to accept the new add-ons and patches offered periodically. Normally, you will have issue after applying the updated patches and this becomes a cause for consideration on whether people should install the service packs or not.
Ideally, installing these patches is a good way to be able to safeguard your computer from threats around the web. But in some cases like this AMD issue, it would be best to be open to proper installation and compatibility issues. In short, as a user you should be able to research and find proper troubleshooting tips so that you can avoid messing up your current system rather than improving it.
There are several issues that can cause a Windows XP computer to not reboot properly after installing Service Pack 3. Most of them affect relatively specific configurations, and most appear to have relatively simple work-arounds. Please: do not do anything rash. I have seen a lot of reports of people who reformat and reinstall when they run into this problem, losing all their data in the process.