The document discusses the error code 0xc0000135, which is commonly caused by missing or outdated versions of the .NET framework. It explains that many applications require .NET to run but it is not always installed by default on some operating systems. Installing the correct version of .NET can resolve the error. It also provides an example of another user who received error codes when trying to open ASPX files, and fixing their .NET Framework installation resolved the issue without needing a restart.