Install the antivirus software that you burned onto a CD-ROM in step 1. The assumption is that any PC purchased after this document is published will have Windows XP SP2 installed, but if SP2 is not installed, you could have that update ready on your disk too. In fact, if you know how, you could have some of the more important Windows patches and updates on your disk also. This would be a good time to install anti-spyware software too.