almost 2 years.
Processor : Intel(R) Core(TM) i% CPU
RAM : 4GB
64-bit Operating System
I'm using Microsoft security essentials..
Every month I'm doing Disk Defragmenter..
I will try to download Free anti-virus.. thanks
MSE is a free av you don't want two of them running at the same time. trying downloading and running these http://www.malwarebytes.org/
. They are on demand and won't cause any issues with MSE .