Microsoft officially ends support for Windows XP in April 2014, there are plenty of Microsoft upgrades or switch to another OS solution.
If your company uses Windows XP or Office 2003, after April 2014, you are living dangerously. The XP OS will run, and you can still work with Office 2003 apps, but Microsoft’s support for these systems ends. As a result, systems running XP and Office 2003 will be increasingly vulnerable to attack.
However Microsoft will update anti-malware signatures for Windows XP through mid-July 2015. But anti-malware updates may not address system or software level flaws