Operating systems may frequently require an update. Many ignore them because…another update, really? Yes! Every day hackers are looking for a vulnerability in software that can be exploited. An exploited vulnerability in software can leave the door wide open for a hacker to steal your information or install malware.
A zero-day vulnerability is one that has been identified but not yet patched. Vendors will release a patch to close the security gap. Once released it is important to install it immediately if you are using a home computer. In an enterprise environment it is usually tested before being pushed out to hundreds of workstations.
Install all security updates as soon as possible. They are more important than you think.