What if you download the offline scanner and scan the machine from a bootable disc or USB key? There are viruses and malware out there that can keep themselves from being found in a running system, but offline (without their programs and hooks protecting themselves) they can be found. That name is most certainly not a "good" .dll name and stinks of virus or malware infection, so scanning offline is always your best option when you suspect malware but can't find it online:
Microsoft Standalone System Sweeper Beta | Microsoft Connect
That tool uses the same engine and definitions as MSE, but runs from a bootable disc or USB key to scan a machine offline, which is usually more effective than an online scan.