Microsoft introduces System Sweeper which is a stand alone utility to remove rootkits and other advanced malware. You need to create a bootable CD or USB using the downloaded application.This tool is really helpful when you cant install any antivirus software on your system due to infection.
Microsoft Standalone System Sweeper Beta, a recovery tool that can help you start an infected PC and perform an offline scan to help identify and remove rootkits and other advanced malware. In addition, Microsoft Standalone System Sweeper Beta can be used if you cannot install or start an antivirus solution on your PC, or if the installed solution can’t detect or remove malware on your PC.
You need to have an internet connection to create the bootable CD/USB , because the application will download the latest files at the time of creation (more than 200MB).
Microsoft Standalone System Sweeper Beta is not a replacement for a full antivirus solution providing ongoing protection
Read more and Download Microsoft Standalone System Sweeper.