Microsoft has fixed a number of critical updates which should be applied as quickly as possible through Windows Update. These vulnerabilities can cause someone to potentially take over your system. This month, Microsoft is also recommending users to install EMET which is a free toolkit for deploying and configuring security mitigation technologies (it assists with keeping your Windows system more secure).
Adobe has released a security update for Adobe Shockwave Player 18.104.22.168 and earlier versions on the Windows and Macintosh operating systems. This fixes a Critical vulnerability, so users of Adobe Shockwave need to upgrade directly.
It’s not everyone who has Shockwave, but if you do you can see what version of Shockwave you have here; http://www.adobe.com/shockwave/welcome/
Should you not see an animation below the “ADOBE SHOCKWAVE PLAYER” test then that means you don’t have Shockwave (and should not install the update).
Those running an old version of Shockwave should uninstall it if they don’t need it for something specific, or update if it is really required to use Shockwave (it’s not common to need it): http://get.adobe.com/shockwave/