How to remove System Tool a fake security antivirus?

Everything is working OK with your computer and all of sudden you are prompted with a windows alert that you are infected, showing a fake scan to scare you. First thing you need to do, DO NOT order anything from the website. Take a deep breath and follow the procedure here to fix it.

It is easy to fix this problem, this is just another misleading (rouge) anti-spyware program.

• You need a tool to remove this program. Actually, you can use registry editor to delete but it is not advisable if you are not familiar on how to use. I suggest that you download one file from Trend Micro website. Here's the link: http://free.antivirus.com/hijackthis/. Download the executable (not the installer) so you can run this tool right away. You need to use a working computer to download the program and save to a USB drive. Then copy the executable program to the infected computer. For example, copy the executable program (HijackThis.exe) to your c:\temp folder. If you don't have a temp, create the folder.
• Restart your computer. After the BIOS message, click F8 function key to boot in Safe Mode.
• Login to your workstation, go to the c:\temp folder and double click HijackThis.exe file. In open file - Security Warning, click Run to continue.
• Click "Do a system scan and save a log file."
• You will see the Trend Micro HijackThis report from R1, R0, 01, 04, etc.
• You need to find the System Tool random executable file, should be something like this: O4 – HKCU\..\RunOnce: [{RANDOM}] C:\Documents and Settings\All Users\Application Data\{RANDOM}\{RANDOM}.exe
• Put a check, then click Fix checked. This program will clean your computer.
• Restart the computer.

Now you removed the System Tool (fake anti-virus tool), it's time for you to run a full scan of your computer. If you don't have a anti-virus program install, check the Microsoft Security Essential. This is free to all Windows operating system version except for Windows Server.

If you need additional assistance, please leave us a comment or visit Whaddya.com to post your question.

References and Tools:

Trend Micro Internet Security Pro 3.0

McAfee AntiVirus Plus 2011 3-User

Kaspersky Anti-Virus 2011 3-User

Norton Antivirus 2011 - 1 User/3 Pc