Micro Bill Systems is a potentially unwanted application for the Windows platform.
Micro Bill Systems is a billing company that provides billing and collection services for websites. Many of their client's sites are age restricted (by consent) or of an adult nature.
Micro Bill Systems will display a bill as a pop-up. When (the bill is) ignored, the display of bills becomes more persistent.
When the Micro Bill Systems application is run, it attempts to connect to auth.microbillsys.com on port 1003. The application then visits a predetermined URL and attempts to install more components using ActiveX.