I was scrolling through google images and must have scrolled over a link for this same site. hxxp://defender-tpda.in/scan3/167/freesystemscan.exe
For sure it is a scam to get you to download from their website. They are impersonating windows defender and trying to make you believe your own computer is contacting you. One way to always be sure. Anything from windows will NOT open in a tab of the browser your using. And all windows messages if connected to the internet, always opens in IE.
Be sure to erase your cookies after going there. And if you have firewall software just stop inet traffic when something happens like this or just pull out your internet cable. Or lock your router if you have one. It, for sure, will stop anything from being dumped on your computer if blocked.