Well, it's hard to say. I will say that msiltu32.dll (or just msiltu32) isn't known by either Bing or Google, other than your post here, so that's not a good start. It could just be benign and a result of uninstalling something and it didn't uninstall cleanly, but other than that those sorts of messages can indeed be remnants of malware. However, if you don't have the file, and can't upload it to virustotal, it probably won't be anything we can say with certainty one way or the other.