This Korean software is bundled with either 1GB or 2GB USB thumbdrive for a reason. After installation from the software on the thumbdrive, you still need the thumbdrive connected on the computer in order to open the software interface or perform any virus or spyware scan from Windows Explorer. This applies to real-time protection from virus and spyware as well.
The update is automatic and it only passed Eicar tests for eicar.com but all Spycar tests on a Windows Vista SP1 computer. Unlike Avast! Antivirus U3 Edition or McAfee VirusScan USB, this software does real-time protection the host computer from virus and spyware.