backendlib.dll is module. Unfortunately, there isn’t much else known about it at this time. The only way to know if a file is malicious is to find out which directory it originated from.
Since more information is needed to troubleshoot this DLL error take the mystery out of the situation by scanning your registry. There are a couple of possibilities for the causes of DLL file errors. These include uninstalling a program which contained a DLL needed by the Windows operating system. Programs installed can cause an overwrite of vital DLL files.
A hardware issue could be to blame such as a corrupt hard disk drive that causes data corruption at every level.
The simplest solution is to head over to ZookaWare PC Cleaner today for a free Windows registry scan. They can take a slow running computer, scan it, and recover the performance you had when you first bought your machine.