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 module 991501cd-64a7-41d7-b45e-3ae48e705c86.dll 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. This file is typically installed with the program Internet Speed Checker by Sailor Project which is a potentially unwanted software program. It is part of the Brightcircle group of web-extensions that inject advertisements in the browser.