Anti Virus (AV) & Anti-Spam

• ESET® Online Scanner

http://www.eset.com/int/home//products/online-scanner/

• Kaspersky Online Virus Scanner

http://www.kaspersky.com/virusscanner

• BitDefender Online Scanner

http://www.bitdefender.com/scan8/ie.html

• McAfee FreeScan

http://us.mcafee.com/root/mfs/scan.asp?affid=56

• F-Secure Online Scanner

http://support.f-secure.com/enu/home/ols.shtml

• Windows Defender Spyware

http://www.microsoft.com/athome/security/spyware/software/default.mspx

• Microsoft® Windows® Malicious Software Removal Tool (KB890830) Microsoft® Windows® Malicious Software Removal Tool (KB890830)

http://www.microsoft.com/downloads/details.aspx?familyid=AD724AE0-E72D-4F54-9AB3-75B8EB148356&displaylang=en

• Microsoft Baseline Security Analyzer v2.0.1 (for IT Professionals)

http://www.microsoft.com/downloads/details.aspx?familyid=4B4ABA06-B5F9-4DAD-BE9D-7B51EC2E5AC9&displaylang=en

• Checkpcidss.com does what the name suggest. It is an online application for scanning your website/server against PCI DSS security compliance. It is developed in Python using network socket programming.    https://syslint.com/checkpcidss

• The Microsoft Safety Scanner is a free downloadable security tool that provides on-demand scanning and helps remove viruses, spyware, and other malicious software. It works with your existing antivirus software.                                              http://www.microsoft.com/security/scanner/en-us/default.aspx

• The enhanced Mitigation Experience Toolkit (EMET) is designed to help prevent hackers from gaining access to your system.

A toolkit for deploying and configuring security mitigation technologies
Software vulnerabilities and exploits have become an everyday part of life
http://www.microsoft.com/en-us/download/details.aspx?id=29851

• Revo Uninstaller Pro

Revo Uninstaller Pro helps you to uninstall software and remove unwanted programs installed on your computer easily! Even if you have problems uninstalling and cannot uninstall them from "Windows Programs and Features (Add or Remove Programs)" control panel applet.
http://www.revouninstaller.com/

• CCleaner

CCleaner is the number-one tool for cleaning your Windows PC. It protects your privacy online and makes your computer faster and more secure. Easy to use and a small, fast download.
https://www.piriform.com/ccleaner

• Glary Utilities 4

The No. 1 Free, Powerful and All-in-one utility for cleaning your Windows PC
Boosts PC speed and fixes frustrating errors, crashes and freezes
Features one-click functionality and easy, automated options
Over 20 tools to maximize your Computer's performance

http://www.glarysoft.com/