nub-san.exe is a Trojan.Podrop-C. nub-san.exe tries to terminate antiviral programs installed on a user computer. Related files: %Program Files%\Media Access\Info.txt %Program Files%\Media Access\MediaAccC.dll %Program Files%\Media Access\MediaAccK.exe %Program Files%\Media Access\MediaAccess.exe %Windows%\win.exe %System%\nub-san.exe %System%\xpjava.exe %System%\msdirectx.sys More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill nub-san.exe process and remove nub-san.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.