Step 1:
Open up Explorer.exe and find Program Files under your C: directory. Open Program Files and then find Windows Defender, rename it to Windows Defender.old.
Step 2:
Go to http://youhaveavirus.com and run the tools. You are able to download now.
The virus is called “zero access”, and you really don’t need Windows Defender, Microsoft has Security Essentials for everything but Windows 8.