Secunia PSI 3.0 is a free computer security solution that identifies vulnerabilities in non-Microsoft (third-party) programs which can expose PCs to attacks. Simply put, it is scanning software which identifies programs in need of security updates to safeguard the data on your PC against cybercriminals. It then supplies your computer with the necessary software security updates to keep it safe. The Secunia Personal Software Inspector (PSI) even automates the updates for your insecure programs, making it a lot easier for you to maintain a secure PC. Using a scanner like Secunia PSI 3.0 is complementary to antivirus software, and as a free computer security program, is essential for every home computer.
Note: As of April 20, 2018 Secunia will no longer support PSI.
How It Works
The Secunia PSI works by examining files on your computer (primarily .exe, .dll, and .ocx files). These files contain non-specific meta information provided by the software vendor only. This data is the same for all users, and originates from the installed programs on your computer - never from their configuration. Please read the privacy statement available at the bottom of this page and through the Secunia PSI application for more details about how information from your computer is used by Secunia.
After examining all the files on your local hard drive(s), the collected data is sent to Secunia's servers, which match the data against the Secunia File Signatures engine (https://psi.secunia.com/) to determine the exact applications installed on your system.
This information can then be used to provide you with a detailed report of the missing security related updates for your system.
Software similar to Secunia PSI 2
With SUMo you'll be able to keep your PC up-to-date by using the most recent version of your favorite software.
Patch My PC can scan your machine to see what application have updates available and automatically patch those for you. You can also use Patch My PC Updater to install applications that aren't currently installed as well.