Windows XP Service Pack 3

As of right now, I would say do not install Windows XP Service Pack 3.

I have experienced several issues with the latest service pack. I had a computer not allow users to login after it was installed and another that would just keep rebooting, which is the most common issue after install. The continuous reboots are mainly with AMD based systems, but it has been found with Intel’s as well. I personally had it happen to me with an Intel, but I have also one successful installation as well.

I have also heard that there are many compatibility issues with the HP pre-loading software. Some anti-virus programs, like ZoneAlarm for example, may show new security risks or threats that aren’t true, it’s all XP SP3.

As always, I recommend never installing anything from Microsoft when it just comes out, let everyone else test it out and find the errors first.