In todays world, where more and more of our application and computing is dependent on Internet, it becomes absolutely necessary for an user to have an active Anti Virus software installed for his/her Windows operating system.
There are many Paid and free solutions available and sometime it may become bit confusing to find the right solution for our self.
Recently Microsoft have come forward with an proper solution for their users. A basic but effective Anti Malware software coming with real time protection.
The Microsoft Security Essentials is offered free for all Genuine Windows (XP / Vista / 7) users and supports both x86 (32bit) and x64 (64bit) platform.
Download (~10mb) -> http://www.microsoft.com/security_essentials/default.aspx
Its a simple 10mb download and easy to install software. However once install, it may require you to connect to the Internet to download latest malware definitions to start working.
However, those who wishes to install the software in a PC without live internet connection, they can also manually download the offline update from Microsoft for Microsoft Security Essentials.