98 out of 100 PCs have 1 or more insecure programs installed!, if you want to know whether there’re known security issues for the software installed in your computer, install Secunia Personal Security Inspector that scans your computer and lists the insecure programs, information about vulnerabilities and links to the patches. In most cases, Secunia provides direct links to the latest updates, so they are easy to download and install. To find more information about security problems and to list all the software from your computer that needs to be updated, switch to the advanced interface.
Secunia's software focuses on updates that solve security problems. More comprehensive solutions for updating your software include UpdateStar, FileHippo Update Checker and Appget, but none of them is very reliable.