Essential Cleaner is a computer infection from the same family as MS Removal Tool. This infection is also categorized as a rogue anti-spyware program as it pretends to be an anti-virus program, but is actually a program that displays fake security alerts and scan results in order to make you think your computer is infected. Essential Cleaner is installed through the use of malware that will install the program onto your computer without your knowledge or permission. When installed, the infection files will be created in a random named folder in C:\Documents and Settings\All Users\Application Data\, in XP, or C:\Documents and Settings\All Users\Application Data\, in Windows Vista and Windows 7. It will then be configured to start automatically when you login to your computer.