Microsoft has released security updates for these vulnerabilities, and the updates are available for download at the Microsoft Update web site (https://update.microsoft.com/microsoftupdate/). Please note that systems joined to the LSU Active Directory automatically receive the critical updates when available. Other updates will have to be installed from Microsoft Update.
Remember to close all applications at the end of work day today, as security updates may require a restart of your machine.
Additional Information / Tools:
Microsoft Security Bulletin - http://www.microsoft.com/technet/security/bulletin/ms09-sep.mspx
US-CERT Technical Alerts - http://www.us-cert.gov/cas/techalerts/
Microsoft Baseline Security Analyzer - http://www.microsoft.com/technet/security/tools/mbsa2_1/default.mspx