>You could take advantage of the free trial period of various AV products e.g. https://security.symantec.com/
>
>You might also want to run Malwarebytes' Anti-Malware (MBAM). This is a tool designed to detect and remove "grayware": products which may pretend to, or actually have a useful purpose, but which also do malicious things like spy on your web activity, change your browser home page or search engine etc. A lot of grayware is not specifically removed by AV packages because some people might actually want the "useful" thing it supposedly does.

Thanks, I will check for that.