I was a Norton Utilities fan back in the DOS days (before Windows). Norton Antivirus was one of the first and best anti-virus utilities out there. Unfortunately, it became bloated and significantly slowed down my computer performance.
While researching for a new solution, I found ESET's NOD32 anti-virus solution. It's one of the highest recommended ant-virus solutions available and it doesn't affect computer performance! I am now a happy user of NOD32 and even purchased a 3 year subscription for 4 computers, what a deal!! My computer hasn't been infected since I installed it and the computer performance improved dramatically since removing Norton (Also McAfee on another computer) and installing NOD32!
Try it, you won't believe the difference!