PUP.Optional.SearchQu is a potentially unwanted application, which contains adware, installing toolbars or other unknown purposes. It is adware program that get install in your system secretly it may enter in you system when you clicked on any suspicious link or via downloading video files from Internet that time it get install in your system with other program. Once it successfully enter in your system then it will very fast propagate itself in multiple copies and occupy more space in your system hard disk due to this your system performance will be slowdown automatically. It will change the DNS setting of your system and also turnoff all important windows functionality. Once infected, PUP.Optional.SearchQu has the ability to change the browser settings including the default search engine, website and privacy settings to take full control of your browser. In most cases, this infection may display annoying ads that promoted by hackers who try to sponsor certain products or programs to users. It affects Internet and system performance thus bringing lots of problems for users. It collects all sensitive details from your system and restricts you from accessing online accounts. It exposes IP address of the attacked computer in-front of cyber criminals and drops other vicious threats into it. Therefore, it is strongly suggested to remove PUP.Optional.SearchQu to prevent risks caused by this adware.