You need to update your operating system because it does not meet the minimum system requirements. The minimum system requirement for this product is Windows XP (Home/Professional/Media Center Edition) SP2 (or above).
For all legal licensees, Windows Service Pack (SP) upgrades are free and can be obtained from the Microsoft website.
The current link for this download is: www.microsoft.com/downloads/search.aspx?displaylang=en. The link may change in the future and using a search engine with the following keywords should assist you.
'Windows XP Download Service Pack'