h4k.com

This web site covers the latest malware on the Internet. It is updated frequently and even has videos of what happens when they intentionally install malware on their test systems.

http://malwaredatabase.net/blog/

SpyBot Search & Destroy is an application for Microsoft Windows that is used to detect and remove spyware, keyloggers, trojan viruses and more. It is a free program that is constantly updated for new threats. This is a powerful program that is easy to use. Spybot can be used in conjunction with your standard anti-virus software to help ensure a clean Windows system.

http://www.safer-networking.org/en/index.html

Rootkit Revealer is a program for Microsoft Windows to help determine if a computer has been infected with a rootkit. If you suspect your computer may be infected with a virus but your standard anti-virus scanner is not detecting anything this may be the program you need.

For more information about rootkits, how this program works, and the download go here:
http://technet.microsoft.com/en-us/sysinternals/bb897445.aspx

VirusTotal is a web site where you can upload files to be scanned by 32 different virus scanning engines and displays the results of each scanner. If you absolutely must open the latest video forwarded to you this is a good site to visit before opening the attachment.

To use the free service just click the “Browse…” button, select a file, the click the “Send File” button. Do not send files that may contain personal or private information. Depending on how long it takes to upload the file most scans are finished within a minute or two on a home high-speed Internet connection.

http://www.virustotal.com/