Top Security Software comparison

Norton 360 Premier Edition 3.0 eliminates the need for any additional security, performance optimization and data backup & restore products. Truly a breakthrough in PC protection, Norton 360 Version 3.0 provides a hassle-free user experience. It includes the strengths of Norton Antivirus 2009 with Antispyware for online threat protection and powerful features similar as those of Norton SystemWorks Premier Edition for backing up your data securely as well as continuously optimizing your PC for peak performance. Automatically fixes common PC problems Gets rid of unnecessary Internet clutter and temporary files. Removes stale Windows registry entries. Defragments your hard drive(s) for faster data writing and access. Files such as photos, music, contacts and financial documents can be backed up automatically to CDs, DVDs or external drives. Includes 2 GB of online storage Norton Pulse Updates - it automatically checks for new virus definitions every 5 to 15 minutes and downloads them in the background for continuous protection without performance sacrifices.

I think Norton 360 Premier Edition 3.0 is the best one.