Antimalware Tool is a fake security software (rogue). It is from the same family as: Antivirus Antispyware 2011, AntiVirus System 2011, Security Inspector 2010, AntiVirus Studio 2010, Desktop Security 2010, Total PC Defender 2010, Desktop Defender 2010, Contraviro, UnVirex.
Antimalware Tool displays a lot of disturbing warning messages pushing users to purchase a license.
If your PC is infected with Antimalware Tool, follow pcthreat guide to remove the infection.