Microsoft has announced its intent to end its support for those versions of Windows which users have not upgraded to their latest service packs.  Specifically, Windows Vista without any service packs will no longer have support after April 13th, 2010.  Windows XP with only Service Pack 2 (WinXP SP2) will likewise have its service terminated on the 13th of July, 2010.  As will any version of Windows 2000 (Win2K).  Also on the 13th of July, Microsoft is moving Windows Server 2003 from mainstream support to extended support, meaning that only the security updates will remain free and everything else will cost money to get help from Microsoft.

“Microsoft believes it is important that all customers take action prior to the end of support date, not only so that they know their options and can prepare, but also to ensure their environments are as secure as possible.”

Obviously, in most cases anyway, simply installing the latest service pack will allow you to continue to enjoy support from Microsoft.  It’s easy.  It’s free.  You really should do it.  For more information from Microsoft on how to upgrade to your latest service pack, look here.