Step 1: Check Spyware and Other Possible Malware with Portable Applications
Many malware programs do not let you install malware removal tools, or if you have one installed, do not let you update them. This is why we are using USB Sticks and going with portable applications. We will not let the malware recognize that we are taking countermeasures against it. However, I must also say that if you are heavily infested or if it is a stubborn malware, it will not even let you visit malware protection websites. In this case, it will be better to go through a proxy server like KTunnel/VTunnel. If this also fails, use a different PC. If at any point you are redirected to an antivirus site that says that you have to purchase the software to remove viruses NEVER do that. These sites' only aim is to own your credit card information.
Download and install the following software to your USB Stick (all links are direct download links)
1.Dr. WEB CureIt Antivirus
2.CW Shredder (this application is only for CoolWebSearch spyware family)
3.HiJack Free: when you run the executable file, you download, double click and set the USB Stick as your installation path. Check the “Do not create a Start Menu item" and uncheck the “Create a desktop icon" and “Create a quick launch icon" boxes. Then install.
4.MultiVirus Cleaner: Open the zip file, run the setup.exe and install the program to your computer. When installation is finished, copy the C:\Program Files\AxBx\Multi Virus Cleaner 2009 folder to your USB Stick. To run the program, click the MVC.exe file.
6.McAfee Stinger: Download the latest release from the website and follow the instructions to install and run.
Check your computer with all these programs. Do not run all of them at the same time! Run them one by one. As you may have noticed, I did not list ClamAV Portable because its malware definitions are old.