Update.lnk is a malicious file, which is related to Personal Security virus. No matter that the name of this program suggests that it seeks to protect computer, it acts just like a typical rogue anti-spyware. As soon as it infects computer, it starts displaying fake pop-up ads reporting about a critical computer's state. After that, it offers to buy its licensed version and fix the system. Of course, after paying the money people find out that they were tricked by hackers. Please, remove Personal Security as soon as it starts showing its ads.
Update.lnk file is installed on the system as soon as dangerous program enters it. Once inside, this file is involved to different activities. It can be used for degrading system's performance, violating victim's privacy or initiating such annoying things as commercial pop-up advertisements, redirects to unknown websites and installation of other viruses. In order to avoid them and make your PC safe again, we highly recommend you to remove Update.lnk from the system. In order to check its trustworthiness and remove it, you can use RegCure Pro.