Secunia Software Inspector
The Secunia Software Inspector will inspect your operating system and software for insecure versions and missing security updates. A default inspection normally lasts 5-40 seconds, while a thorough inspection may take several minutes. Note: If you have anti-virus software or similar enabled, an inspection may increase significantly in duration.
There is no charge for this service for consumers and the system will provide links to free software updates for software that is insecure.