Virus Removal Tools from AVG

To remove some of the most common viruses from your system AVG Provides some tools.To download or to know about them Click Here

Spyware

To prevent spware attack from internet bellow one is recommendable.

http://www.javacoolsoftware.com/downloads.html
To scan for already existing spyware which is already infected in your system bellow one is best.
http://www.superantispyware.com/
This bellow one is also best for removing and preventing spyware
http://www.safer-networking.org/en/download/index.html

Kaspersky Internet Security

http://www.kaspersky.com/