Do you know what GuardCenter is?
GuardCenter is a rogue anti-spyware program that may be installed through Trojans. Once your system is infected with GuardCenter it may launch security alert popups in an effort to get you to purchase a full version of GuardCenter. GuardCenter runs spyware scans on your system displaying exaggerated scan results. Do not under any circumstances purchase GuardCenter, it is not a legitimate spyware removal program.
In non-techie terms: GuardCenter is specifically designed to conduct illicit installation methods to extort money from you. GuardCenter may ask you to purchase a fill version of the software. If you are prompted to do so, do not download or purchase any products related to GuardCenter.