Hi, I use chrome and keep getting chrome extension that says This web page not found. How do I?

if you download chrome that feature is included in the download if you go to the page up in the right had cornor you will see three lines click on to that then go to internet options it will then take you to extentions click onto that and you can either remove extentions at the point or go to installed programs and get rid of things you don't want that way its better to use the extentions that way buy going to the three lines that way and taking out the things you don't want