In Registry Editor window:
[HKEY_LOCAL_MACHINE\SOFTWARE\Mcft\Windows\Curr entVersion\Internet Settings\5.0\User Agent\Post Platform]
Right click Post Platform->New->String Value-> Type "Alexa Toolbar"=""
Restart PC. Done!
Note: For IE 7.0 the "Post Platform" will located at:
[HKEY_LOCAL_MACHINE\SOFTWARE\Mcft\Windows\CurrentVersion\Internet Settings\User Agent\Post Platform]