I am doing this on behalf of a friend. His computer started to stop him from accessing web pages, not the internet just the pages. It said that they were all dangerous to his computer. As far as I know he did not have any AV software installed. I told him to run a windows defender scan and it gave him an error message. Then another message popped up saying system hijack. I am kinda new to computers so I told him to shut down and stay that way just incase it was a botnet or something sinister. Really need hel