Operating Systems	Microsoft Windows 2000 Professional (Service Pack 4 or higher) Microsoft Windows XP Home Edition (Service Pack 2 or higher) Microsoft Windows XP Professional (Service Pack 2 or higher) Microsoft Windows XP Professional x64 Edition Microsoft Windows Vista Home Basic (32 or 64-bit) Microsoft Windows Vista Home Premium (32 or 64-bit) Microsoft Windows Vista Business (32 or 64-bit) Microsoft Windows Vista Enterprise (32 or 64-bit) Microsoft Windows Vista Ultimate (32 or 64-bit)
Requirements	Intel Pentium 300 MHz or higher (or equivalent) 128 MB of RAM Intel Pentium 800 MHz or higher (or equivalent) 512 MB of RAM
Additional Features	Rollback of unwanted changes on your computer Self-defense of the antivirus program from being disabled or stopped Tools for creating a Rescue Disk Free technical support