This adware is a web browser extension that will inject advertising in the browser in the form of unwanted banners and text-links which may link to malware sites and install unwanted software. The application phdsetup.exe by ColoColo Apps (Bright Circle Investments) has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. The program is a setup application that uses the Nullsoft Install System installer. It is part of the Brightcircle group of web-extensions that inject advertisements in the browser.