Trojans are malicious applications that pose themselves as legitimate software in order to trick users to install them. Once on the victim's machine, it may run any number of malicious process to steal vital information or inflict damage to other software.
Changes the windows desktop background to black and displays a message that you are in danger.
Clicking on the fake text takes you to antivirus-gold.com.
Desktop background changed to display a fake warning message.
Remove the file screen.html in the windows directory
Do a full malware scan with X-cleaner or Regblock.