Recently we met a strange problem: when we tied to open a new webpage using Chrome browser, it always popup a strange advertise page first, no matter what the new web page which we opened is. for example, even we just tried to open a Google news page, the same adv page still came.
And, today, when we tried to open a webpage which we are using daily, it is a stable page without any adv popped up before. but we saw the following error message:
Danger: Malware Ahead!
Google Chrome has blocked access to this page on botcrawl.com.
Content from topictorch.netseer.com, a known malware distributor, has been inserted into this web page. Visiting this page now is very likely to infect your computer with malware.
Malware is malicious software that causes things like identity theft, financial loss, and permanent file deletion. Learn more
So we know now there must be a malware in our PC system now. then we searched on Google, found the main topic were about a software Yontoo which was from Yontoo LLC company.
See here, Yahoo answer, a friend named Brandon:
I just fixed this. You must have installed something. Maybe a toolbar, or downloaded something. I uninstalled Yontoo and it fixed it no problem
Check your installed programs.
Start Button>Control Panel>Uninstall Programs (For Win7)
Once you uninstall whatever it is it should fix this.
So we went to Control Panel and saw we really have a Yontoo software installed:
Then we uninstalled it right away, but when you uninstall it, please know you have to check on the right option to remove this not nice software, see below: you have to choose the bottom option, otherwise you will find the Yontoo still there. Also, you have to close your web browser also !
Again, please close your web browser when you uninstall Yontoo.
After you uninstall Yontoo, you will see your problem gone.