Security-tool2010.com is classified as a browser hijacker because it changes browser's settings, imitates system scan and displays false threats to trick you into thinking that your computer is infected with malware. This browser hijacker is titled "My computer Online scan - Security Tool 2010". As you can see in the image below, this fake scanner impersonates My Computer view. That's well-thought-out cyber criminals scheme how to make the scam look more realistic and to make you think that your computer is infected when in reality it's not. You should close Security-tool2010.com and similar sites immediately. Otherwise you can infect your computer with Trojans or rogue program. If you unadvisedly downloaded Security Tool onto your computer you probably see many fake warnings on your screen. Please read Security tool removal instructions and remove the rogue program from your computer as soon as possible. Note that this virus can be removed for free, so you don't have to buy any removal tools.