This guide will help you remove malicious software from your computer. If you think your computer might be infected with a virus or trojan, you may want to use this guide. It provides step-by-step instructions on how to remove malware from Windows operating system. It highlights free malware removal tools and resources that are necessary to clean your computer. You will quickly learn how to remove a virus, a rootkit, spyware, and other malware

Guide: http://www.selectrealsecurity.com/malware-removal-guide/

Update:

- Revised the introduction
- Added an important note about the USB autorun file (Preparation for Removal)
- The guide is now officially copyrighted (added copyright notice).
- Changed the subheadings
- Revised Step 3
- Changed a few links
- Updated the PDF version