Microsoft Windows XP is the most widely used operating system in the world. This, together with the fact that nowadays it is common to keep a computer connected to the Internet for hours and hours on end, means that most of the attacks carried out via this route will be intended to do harm to the PCs of all those users running this OS.
To protect against this trend, Microsoft have made available their Service Pack 3 for Windows XP, a complete package of updates with important improvements to security, stability and system performance.
If you want to keep your copy of Windows XP in top form, installing Service Pack 3 is a must.