Released today is a new free tool from Microsoft, this is a solution accelerator with scanning tools included.  This includes making a WindowsPE CD to boot from to scan a computer for malware. 

"This guidance provides a set of tasks that licensed Windows® users can perform at no cost to create the Malware Removal Starter Kit. Recommendations for free malware-scanning tools are included. You can use these tools in combination with the kit to conduct scans, detect problems, and remove malware from your computer."

Malware Removal Starter Kit: Overview

Regards,
Anthony

Anthony Clendenen | Solutions Engineer | 1E Inc.

We are considered a premier SMS Solution Provider by Microsoft. See us at http://www.microsoft.com/smserver/partners

"1E's tools add significant value to SMS in particular, around patch management, simplified branch designs and desktop migration. Having been a trusted Microsoft partner for five years, 1E's track record in consultancy and software solutions comes highly recommended."
- Bill Anderson, Lead Product Manager, Enterprise Management Division, Microsoft