It is very common that a corrupted or not found dll error messages display. DLL is the short of Dynamic-link library is Microsoft's implementation of the shared library concept in the Microsoft Windows and OS/2 operating systems. These libraries usually have the file extension DLL, OCX (for libraries containing ActiveX controls), or DRV (for legacy system drivers). As with EXEs, DLLs can contain code, data, and resources, in any combination.
How did dll error happen
Just like other infection, it can be detected itself into the spam email attachments, free application downloads, if you agree with the default installation of the free software, you may allow this nasty virus to come into your computer. Or it can invade into your machine via visiting questionable websites, sharing malicious files with other users online, using infected external hard drive, etc.
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It is also likely to be caused by another program overwrote the required version of DLL or it maliciously or mistakenly deleted or uninstalled the DLL file.
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