Adware:Adware (or spyware) is a small program that is designed to show advertisements (in various form and degrees of intrusiveness) on your computer. It often reports personal information back to its owners. As a result your sense of privacy can be violated.
PUA.Madcodehook is an example of a Potentially Unwanted Application (PUA) that some experts refer to as a form of adware. PUA.Madcodehook often comes bundled with freeware programs such as messengers, alerts, weather reports, etc. Once active, PUA.Madcodehook becomes responsible for the numerous annoying pop-up advertisements that plague your PC.
Technical details (How to remove PUA.Madcodehook(pop up))
processes files: pctsAuxs.exe
registry entries: RUNNING PROGRAMwinlogon.exe RUNNING PROGRAMexplorer.exe HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesPC Tools Auxiliary Service