There is a handy way to check for system updates in terms of applications. Simply install SI Сlient that is available on Software Informer and perform a scan of your computer. In a few seconds, you will be provided with information about possible updates related to your system's applications. In most of the cases, you will have the possibility to download the updated package.
I have used it by myself and it works quite good with accurate results and scanning procedure. It detected updates for almost all my installed software. If you want to keep a list of your software applications, simply register your username from the main page, then log in in Client.