NOTE: if you can't download or install the above programs in Normal Mode, reboot your PC in Safe Mode with Networking. Also several people told that they did a system restore and successfully removed this infection. However, even then you should still scan your PC with at least one reliable anti-spyware or anti-virus program.
The official website of Windows Defender looks like this:
Whereas Windows Defender 2010 associated websites are:
As you can see, the scammers use Microsoft colors and security shield logo as well as logos of well knows and trusted security related websites such as virusbtn.com. The goal is very clear – to make those scam websites look more reliable when the rogue program Windows Defender 2010 will be spread using various fake online scanners and bogus websites (we hope that won’t happen). Currently this virus is not active or actively promoted. Keep your computer protected from such malware. Make sure that you use updated anti-virus software. We will keep an eye on this virus and provide more information (removal instructions), so stay tuned.