Problems with ksuser.dll are somehow caused by a problem with Microsoft DirectX.

The ksuser.dll file is one of many files in the DirectX software collection. Since DirectX is used by most Windows-based games and high-end graphics programs, ksuser.dll errors usually only appear when using these programs.

Follow these steps in the order they are presented below to try the most likely solutions first.

Restart your computer if you haven't already. The ksuser.dll error could be a fluke and a simple restart could fix it completely.