XP Internet Security is a rogue security tool. The same program will appear as XP Internet Security on Windows XP, but it will present itself as Vista Guardian 2010 on Windows Vista and it may appears as Win 7 Antispyware 2010 on Windows 7 operating system. It is accompanied by a malicious trojan which enters the system through its vulnerable places and then creates a backdoor for XP Internet Security to sneak.
It acts like a legitimate security program, but it is not able to provide any actual computer security service. It is only imitation of a anti-spyware application. Even if it shows you scan results and warnings, you have to ignore it, because it is not real danger. It seeks that you purchase supposedly legal XP Internet Security full version. This is all scam and you have to terminate this malware.