The l3einetplug.dll file is part of the l3einetplug.dll Module. This comes from an unknown author but that is not too unusual. Since the file resides in the registry, many programs and applications have access to the file. Any one of them could have been the originator of the file.
File Not Found
The l3einetplug.dll error is a registry error. This means that somewhere along the way Windows was not able to access the file like it should. Most likely, the file was damaged or accidentally deleted by another program. Registry errors happen all the time and they are nothing to really worry about.
However, you do need to resolve the error as soon as possible. Any program that needs that file will not work properly until you do. In addition, registry errors can build up and slow down your computer. They can even cause your computer to crash. The chances are if you see this one, then there is a hundred more hiding where you can see them.
If you could determine which program is flagging the error, then you can attempt to uninstall and reinstall that program. That would get rid of the error message. If you cannot determine which program is causing the error or do not want to look for it, then you can use ZookaWare PC Cleaner.
ZookaWare PC Cleaner is a powerful registry cleaner. It will scan, detect and clear out all registry related errors from your computer. If you run it on a regular basis, you will not see registry errors again. Try it out for yourself, and see how much better your computer runs without all those errors slowing it down.