I present this thread here, just as a form of support, and a possible guideline. If you fail to kill the mentioned file, and you fail to do so ,you could consider to run killbox from here: http://www.bleepingcomputer.com/files/spyware/KillBox.zip
Killbox is an advanced tool to kill files of nasty spyware infections, that are difficult to remove. Use it under the guidance of an expert, or if you absolutely sure what to do. It is not a tool for experimentation by the ignorant. A good link to learn to work killbox can be found here: http://process.networktechs.com/KillBox.exe.php