A new update hit today with the following description: Windows Malicious Software Removal Tool x64 - September 2010 (KB890830) Download size: 3.0 MB You may need to restart your computer for this update to take effect. Update type: Important After the download, this tool runs one time to check your computer for infection by specific, prevalent malicious software (including Blaster, Sasser, and Mydoom) and helps remove any infection that is found. If an infection is found, the tool will display a status report the next time that you start 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 you can run an online version from microsoft.com. This tool is not a replacement for an antivirus product. To help protect your computer, you should use an antivirus product. Could this update interfer with RemoveWAT somehow?