Hoje, meu Windows Update avisou de algumas atualizações de segurança, incluindo um tal de “Windows Malicious Software Removal Tool”. A descrição é essa:
After the download, this tool runs once to check your computer for infection by specific, prevalent malicious software (including Blaster, Sasser, and Mydoom) and automatically helps remove any variants found. After it runs, the tool is deleted from your computer. A new version of the tool will be offered every month. If you want to manually run the tool on your computer, you can download a copy from the Microsoft Download Center or run an online version from microsoft.com. In addition to using this tool, you should use an up-to-date antivirus product to help protect your computer from other malicious software.
Talvez seja uma boa ajuda para quem ainda usa Internet Explorer.