Why should XP be obsolete?
Microsoft have given you and the rest of the world more than enough prior notice that Windows XP is end of line.
They extended the support a little bit over the last few years, but have drawn a very firm line in the sand now that D-Day is 8th April 2014. They mean it this time. They will no longer provide
any software updates or support (well, they will, the price is 500000USD per annum..... so only really viable for governments and bluechips who've got some justifiable reason to still be running an obsolete OS.... and even then, the updates will only be provided on-request, no more regular updates).
If you know what's good for you, you should be making plans to migrate to either a newer version of Windows or another operating system before that date.
It is totally unacceptable and irresponsible to wish to use a Windows XP machine on the internet after 8/4/14. Only XP machines that are
permanetly disconnected from the internet can be deemed OK to use.
And please, spare me the nonsense of "oh I'm running anti-virus", "its behind a firewall" etc. etc. All codswallop and utter nonsense. AV and other security mechanisms are totally worthless if the core OS is not being kept up to date.