AUNPS is a typical adware program. Some malicious web sites can secretly install it to vulnerable systems. AUNPS starts automatically on every Windows startup and stays hidden in background. From time to time it displays annoying commercial advertisements in opened Internet Explorer windows. Such activity noticeably obstructs your usual web surfing. Use anti-spyware program to completely remove AUNPS from the system or manually kill its processes and delete corresponding files located in C:WindowsSystem, C:WindowsSystem32 or C:WinntSystem32 folders.