After the release of Windows XP SP3 there are thousands of people who are facing various problems. The problems are from installation of SP 3, to post installation problems. All these problems occur because people really don’t follow the correct way of installing the service pack :
In order to ensure that you don’t face such a problem please follow these steps -
1. Download the service pack 3 from here (official microsoft download) (direct link).
2. Restart the computer and boot the computer in safe mode.
3. Install the SP 3 from there.
Note : If you don’t know how to boot in safe mode, then simply exit all the third party software and especially antivirus, firewall, anti-spyware etc.
Please note : Some people who are using Norton internet security are reporting that it’s giving false positives after they install SP3. It’s telling ctfmon.exe as a keylogger. It’s just a false positive and you should ignore that alert from Norton internet security.