Today I bought WindowsXPPro Genuine

Question

Today I bought WindowsXPPro Genuine Adv Product Key Lic Online. My problem is that now my computer won't work. For example: when I go on Pogo I keep getting an error code with Microsoft Internet Exploreer that says that I am missing an update and then it shuts down. Can you help me? I am becoming really frustrated because I use my computr every day and now it won't work.