Malwarebytes.. The best for running now and again. Uncheck the option to run the Pro trial version when it is offered to you during installation..
ADWcleaner.. This is a good follow-up having run Malwarebytes. It sometimes gets stuff which Malwarebytes leaves behind. On the website, only click on the download button directly below this 'AdwCleaner 5.0.2.6 Download'. Any other 'download' button on the page will get you into more trouble than Malwarebytes can handle alone.. :-)