Security must be becoming an important issue for Microsoft, as this is the second release in almost as many days, coming hot on the heels of its AntiSpyware software.
Download this small tool and your PC will be scanned and checked for malicious software. Should any be found it is automatically removed and a full report displayed on-screen at the end of the scan.
A new version of this tool will be released every second Tuesday of the month and the download link above takes you to the Microsoft download page to ensure you get the most up-to-date version.
You must have administrator access in order to run this software on your PC.