How to remove "Warning! Visiting this site may harm your computer!"

I recently came across this spyware from my customer pc.

"Warning! Visiting this site may harm your computer!" Screen is Dangerous
" This web site probably contains malicious software program, which can cause damage to your computer or perform operations without your permission. Your computer may be infected after visiting such web site.
We recommend you to install (or activate) antivirus security software. "

I have a choice to either “Continue Unprotected” or “Get security software”. When you choose get security software then it will be redirected to the purchase page of whichever rogue is being promoted.

Solution:

 use combofix

1. Temporarily disable your antispyware, antivirus and any antimalware real-time protection, so they may interfere with running of ComboFix.

2. Download Combofix.
Download combofix from one of the following sites and save it to your Desktop.

3. Run combofix.

• Close all programs. Your Task Bar should be clear of any program entries including your Internet Browser.
• Double click Combofix.exe icon on your Desktop to start it.
• If the Microsoft Windows Recovery Console is already installed, ComboFix will continue it’s malware removal procedures, if no, then follow the prompts to allow ComboFix to download and install the Microsoft Windows Recovery Console and when prompted, agree to the End-User License Agreement to install the Microsoft Windows Recovery Console. Once installed, you should see the following message:
  
  
  
  

  The recovery console was successfuly installed.
  Click ‘YES’ to continue scanning for malware
  Click ‘NO’ for exit
  Click YES button.

• The scan will temporarily disable your desktop, and if interrupted may leave your desktop disabled. If this occurs, please reboot to restore the desktop. Even when ComboFix appears to be doing nothing, look at your “drive access” light. If it is flashing, Combofix is still at work.
• When finished, it shall produce a log for you.

Note: Do not mouseclick combofix’s window while its running. That may cause it to stall


No internet connection after running Combofix?

Restart your computer to restore back your connection. If it does not work, then click Start ->Settings -> Control Panel. Double click to Network connections. Locate your connection and right click on it. In the menu click to Repair option. When repair proccess has finished, your connection should be working again.


Download ComboFix