Are you still running CMS 2002? Or SPS 2003?
There was a lot of hype on Windows XP going out of support on April 8th but be aware that there are other products as well - including CMS 2002 and SPS 2003 which will go out of support on April 8th.
Other products running out of support on April 8th:
Windows Server 2003 and Windows XP Embedded are supported for a longer timeframe: