2012 Update: there might be new versions of this tool called: Security Tool 2011 and Security Tool 2012.
Security Tool is a rogue antivirus application that deliberately gives reports of false system security threats on your computer and displays fake security alerts or notifications to make you think your PC is infected with malware. The misleading application is from the same family as Total security 2009 and System Security. When installed, SecurityTool will be configured to start automatically when you log on into Windows. Then it will imitate system scan and display a variety of infections that can't be removed unless you purchase the program. The files detected during the scan are either harmless or legitimate system files and can't cause any damage to your computer.
Security Tool is pushed through the use of Trojans, fake online anti-malware scanners and other malicious software. It is installed along with Trojans FakeAV that display fake security warnings and promote SecurityTool malware. Once running, the bogus program will block legit programs and especially anti-virus software. Another interesting thing is that if you click on Updates button, you will see “Updating”, but actually there is no network activity. It's just another argument why Security Tool is classified as a rogue security application. What is more, this parasite will impersonate Windows Security Center and constantly display warnings/notifications about serious security threats and privacy issues. It may claim that your computer is under attack by an Internet virus or that private data can be stolen. For example:
“Security Tool Warning
Spyware.IEMonster activity detected. This is spyware that attempts to steal passwords from Internet Explorer, Mozilla Firefox, Outlook and other programs. Click here to remove it immediately with SecurityTool.”
To make things worse, SecurityTool or its 2011 and 2012 variants will hijack web browsers and block certain security websites obviously to protect itself from being deleted. It should be already obvious that this program is a scam. Do not purchase it. Instead, please use the removal guide below to remove Security Tool from your PC manually for free.
Security Tool manual removal:
Delete registry values: