TOK
Try a Free install of the Secunia Personal Software Inspector.
See:
http://secunia.com/products/consumer/psi/
It can be used to do a full scan of your machine and produce a report (ie. 'Scan Results'). It will detect and can be set to install all and any missing security patches (ie 'Updates') for ALL of your PC's software.
They say:
Secure Browsing
Secure Browsing is without a doubt one of the most important aspects of online security. If your browser (Internet Explorer, Firefox, etc.) or its plugins (Adobe Flash Player, QuickTime, Sun Java, etc.) contain vulnerabilities, then you're exposed to security threats every single time you visit a website.
This page illustrates what you, as a minimum, need to do and be aware of, before launching your browser and heading out on to the World Wide Web:
1) Make sure your browser is up-to-date with the latest security patches
2) Make sure that programs and plugins that are integrated directly with your browser are up-to-date with the latest security patches
3) Verify that your browsers or its plugins don't have known security issues for which no security patches have been released from the vendor (unpatched vulnerabilities)
4) Be careful and vigilant. Don't accept anything - don't ever say "Yes", "Run", or "Install" to anything if you don't know exactly what it is.
Once you can cross off all 4 from this list, you can rest assured that automatic attacks such as drive-by installation of malware through your browser are a thing of the past.
Auto Update
The key benefit to you is that once installed and configured for Auto Update, the Secunia PSI automatically installs the most important patches without further user interaction, thus relieving you from spending time on fetching the patches by yourself, and then manually installing them.
To secure your computer with Auto Update, go to the Secunia PSI "Configuration" section, and ensure that the Auto Update option is checked.