Home» Antivirus» 5 best antivirus software for Windows XP Service Pack 3 in Windows XP was released to manufacturing on August Comodo's best antivirus for Windows XP helps to protect against spyware, trojans , keyloggers, viruses, malicious URLs, and more. Get complete antivirus protection for Windows XP – for free! AVG keeps you safe from viruses, malware and other online threats. Results 1 - 20 Key Features Pros Cons Key Features Scan is the first step ESET NOD32 Antivirus will do. License: Free; OS: Windows XP Windows Vista.