WinTaskAd is a typical adware application that shows undesirable pop-up advertisements. It can secretly get into the computer from some malicious web sites. WinTaskAd drops its files into the default computer directory and alters the registry, so the threat could run on every OS startup.
HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionRunWindowsTaskAdHKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionUninstallWindowsTaskAd