Avast Home Edition is an excellent antivirus tool works as PC guard, antivirus and firewall to your PC.

Avast Home Edition is an antivirus tool that can is used to guard the PC and network. It’s very easy to configure and use that the novice as well experienced used will benefit by the tool equally. Avast Home Edition allows scanning of the whole disk or particular files or based on some parameters including wildcards. The sensitivity of the level of the programs detectors’ can be adjusted while scanning downloaded files, instant messages, e-mails, and a host of P2Ps.
Avast antivirus very efficient in boot time antivirus scanning but slightly slow. To save time, this can be skipped.
On encountering any malicious file, Avast provides virus clean up tools as well. Also, options are available for blocking URLs and file operations like to files or even renaming, deleting or formatting them.
This free ware tool offers real-time protection and clock work update too.

Avast Home Edition Requirements :

Operating system: Windows Vista, Windows 95, Windows Me, Windows NT, Windows 2000, Windows XP, Windows 7, Windows 98