To defend computers running Windows Operating System efficiently from the latest malicious software, Microsoft offers a new version of this Malicious Software Removal Tool every month. You can either download a copy of it manually from the Microsoft Download Center or set the Automatic Updates feature on your PC to Automatic for the newest version to automatically get delivered and installed on your computer as soon as it is released by Microsoft.
As Malicious Software Removal Tool is just a post-infection removal tool, it can never work as a replacement for an antivirus software. So, it is always recommended that you run an up-to-date antivirus software on your PC and defend your computer from all types of viruses and worms.
Download ‘Malicious Software Removal Tool’ from Microsoft Download Center