Adware.Win32.MalwareAlarm is a fake system popup which is generated by fake anti-spyware program like AntiSpySpider, Advanced XP Defender, IEAntiVirus, IE AntiVirus, IE AntiVirus 3.2, MalwareAlarm. These programs will display Adware.Win32.MalwareAlarm or related warning messages in users computer system. Those rogue anti-spyware programs usually can get into users computers without their permission or notice, through Trojan like Zlob, malware or even virus. Usually, the Trojan comes in a form of fake video codec ( like VideoAccessCodec, Video ActiveX Codec, Video Activex Object Error). Rogue anti-spyware programs will start to display the Adware.Win32.MalwareAlarm fake system alerts or fake security messages to trick user into buying the "full" Version of the rogue anti-spyware programs.
The warning message should look like this:

“Warning! Spyware detected on your computer! (in black font within a yellow box) Install an antivirus or spyware remover to clean your computer. (white font within a blue box)”

or

“Your browser was hijacked by Adware.Win32.MalwareAlarm”

Users should not trust these messages and should delete Adware.Win32.MalwareAlarm as soon as possible from their computer to protect their own data and privacy!